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dpiers

1,751 karma · joined January 31, 2012

Currently: Staff Data Analyst @ Uber

Previously: Growth Engineer @ Uber Product Engineer @ BitTorrent Full-stack Dev @ ZeroCater Game Engine Programmer @ Terminal Reality

Email: d@nielpie.rs Twitter: danielpiers Github: dpiers Blog: http://da.nielpie.rs Resume: http://goodwith.computer

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dpiers··on Unfortunately, the Electric Scooters Are Fantastic
This is intentional, and conserves a considerable amount of battery power. Bird specifically instructs riders to kick push twice when starting from a stop. Accelerating eats up significantly more energy than maintaining speed.
dpiers··on Buffett Proposed $3 Billion Uber Investment But Deal Crumbled
I can't comment on Uber's financials or accounting practices, but I can add some context on the author linked: Hubert Horan has published numerous articles with very negative outlooks on Uber over the last few years.

A good example is one of his original articles from 2016 [0], which calls Uber out for having -143% profit margins in 2015. In 2015Q1, Uber's revenue was $287MM and loss was 385MM. Horan claimed there was "no evidence that Uber’s rapid growth is driving the rapid margin improvements achieved by other prominent tech startups as they “grew into profitability.”"

However, 2018Q1's revenue was 8.7x and losses were only 1.2x the 2015Q1 numbers. Horan was clearly wrong, and underestimated the potential of the business. I believe he still doesn't 'get it'. If you don't believe in the potential for any growth business, the numbers can look bad on paper, but time will decide who will be vindicated and who will be disproven.

[0]: https://www.nakedcapitalism.com/2016/11/can-uber-ever-delive...

dpiers··on Buffett Proposed $3 Billion Uber Investment But Deal Crumbled
Uber grew net revenue from 2017Q1 to 2018Q1 by 67% to $2.5 billion, which is unprecedented at that scale, and did it while significantly reducing losses. Uber is either the dominant player, or has a stake in the dominant player, in every rideshare market around the world. A lot of governance and litigation risks have been mitigated or reduced in the last year (CEO leaving, very public board infighting, Waymo lawsuit, etc).

The drama last year caused a depression in valuation, but the financials remained solid and the business has good management, leading to an opportunity for Buffett to acquire a stake at a discount.

Full disclosure: I work at Uber, but the numbers I quoted are public and the opinions are my own.

dpiers··on Tesla in autopilot mode crashes into parked Laguna Beach police cruiser
Yes, because people are known for diligently reading fine print. /s

Cadillac has an eye-tracking system that deactivates the self-driving features if you aren't watching the road, and their system is limited to specific highways they have mapped.

Tesla has a ridiculously inadequate attentiveness control, and they do little to nothing to remind people who regularly fail to keep their hands on the wheel. They don't nag people because they want them to believe the car is more capable than it actually is.

And, I say that as a proud owner of a Model S with Autopilot v1.

dpiers··on Bitcoin Gold Hit by Double Spend Attack, Exchanges Lose Millions
Not if it destroys the credibility of a rival coin, which I suspect could be the case here. Many in the "real Bitcoin" community call Bitcoin Cash a fraud because its existence reveals the specious value of their "real" cryptocurrency.

Executing a double spend attack on Bitcoin Cash would be a massive success for Bitcoin owners. Same goes for Bitcoin Gold.

You could even create a mining pool/network - let's call it CoinFucker - where every now and then the pool's resources were diverted to attack a rival coin. Doing so damages that coin's reputation, and in doing so reduces the competition. This would be a great way for the majority of mining/computational power to squash would-be rivals.

dpiers··on How the Nintendo Switch prevents firmware downgrades
It does, but this prevents your system from being irreversibly updated by accident. I remember removing R6T3[1] on my Xbox 360 so that it wouldn't accidentally be updated to a non-homebrew/exploitable version. Without the resistor present, the voltage wasn't high enough to burn the eFuses. An update could run, fail to boot, and I could reflash it to the old version.

1: http://www.free60.org/wiki/R6T3

dpiers··on Savedroid Says ‘Exit Scam’ Stunt is Lesson to Crypto Community
I am eagerly awaiting the third act in this saga, where it is revealed that the whole exit scam/"PR stunt" was a misdirection and the real scam is uncovered.
dpiers··on Silicon Valley Venture Capitalists Prepare for an I.P.O. Wave
Also, this is functionally equivalent to auto-selling RSUs and immediately repurchasing shares with the proceeds, from a tax perspective. RSUs should literally be treated like cash bonuses for public company employees - you should only keep the number of shares you would buy out of your paycheck.
dpiers··on Bird has raised $100M for electric scooter sharing
One scooter could easily have 5-10 trips per day. At $2/trip, the payback period on a $400 scooter is 20-40 days. The economics here (and with dockless bikes) are quite impressive, which is why billions of dollars has been dumped into dockless electric personal transportation companies over the last few years.

The bigger question here is whether people will adopt scooters when they are more comfortable on bikes.

dpiers··on Employees at Practice Fusion got nothing as execs pocketed millions
I believe they're mistaken - 500k/1MM are the new exemption phaseout points.
dpiers··on Why you can’t buy a high-end graphics card at Best Buy
I did, too - not sure if you’d remember me, but I used to go by Zanzang. I went from modding games to programming them, then from the game industry to startups.

Funny how 10 (plus?) years later we’d run into each other on a different site.

dpiers··on Why you can’t buy a high-end graphics card at Best Buy
Unrelated - did you used to frequent a Halo tricking forum called HIH?
dpiers··on Lyft says nearly 250K of its passengers ditched a personal car in 2017
I have worked at Uber for 4 years, but I spent the first 22 years of my life as a resident of Lewisville. It’s been amazing watching the transformation from when I first started (No cars available) to now (ETA ~5 min) around my parents’ house. The last time we were there, my wife dropped me off at a coffee shop to get some work done while she did some errands, and when I was done I got an Uber back home.
dpiers··on UK Cops Want to Use AI to Spot Child Abuse But It Mistakes Desert Pics for Nudes
Close up, they always look like landscape...
dpiers··on Three Delusions: Paper Wealth, a Booming Economy, and Bitcoin
Correct, but the article specifically referred to securities as zero-sum transfers. A security is linked to something that has value, and exchanging the security doesn’t alter the value of what the security is linked to.
dpiers··on Please invest responsibly – an important message from the Coinbase team
"Please invest responsibly" - coming from the company that lets people buy cryptocurrency with credit cards.

This blog post reads like an attempt to preempt a lawsuit after the price of BTC crashes and people are stuck with rapidly depreciating coins because Coinbase's servers were too overloaded to process a sell order.

dpiers··on A tale of two bubbles, the dot-coms and Bitcoin
Bitcoin came out in January 2009, and the first iPhone came out in June 2007.

Other than that minor detail, I generally agree with your comment.

dpiers··on CoderPad – Interviewing Platform for Programmers
Vince, it sounds like things have come a long way since we had coffee back in May 2013. Congrats on sticking with it and building a decent business.
dpiers··on Initial Coin Offerings Horrify a Former S.E.C. Regulator
I believe the intention is the former; the Code of Hammurabi is one of the oldest known sets of written laws, and almost half of it deals with contracts.
dpiers··on Warning Signs About Another Giant Bitcoin Exchange
How is bitcoin useful? Other coins do exactly the same thing with faster transactions, more anonymity, and lower fees.
dpiers··on Recruiter uses email automation to increase CTR to 750% above industry average
Wow, spam works. No wonder it’s so popular. /s
dpiers··on The Paradise Papers: How Ridiculously Easy It Is for the Rich to Avoid Taxes
| Both of these Papers were revealed by an organization with the cumbersome name of The International Consortium of Independent Journals (ICIJ) — a group in need of a new name and a publicity agent

International Consortium of Investigative Journalists. The name is fine and the authors (extremely basic) facts are wrong.

dpiers··on Mt. Gox Bankruptcy Wasn't Really a Bust
Bankruptcy is for settling debts, not judging whether someone's actions led to your financial losses. In this case, the amount of the debt was determined by the value at the time the bankruptcy trustee took control of Mt. Gox's assets. That doesn't mean Gox users haven't been harmed by being deprived of an asset that has appreciated significantly due to misconduct or fraud by Karpeles et al.
dpiers··on Proposed Tax Reform Stands to Impact Equity and Performance-Based Compensation
Most companies move to RSUs by the time typical employees would hit the exercise cap.
dpiers··on Proposed Tax Reform Stands to Impact Equity and Performance-Based Compensation
ISOs are priced at the 409a value, which can be 1/10th of the preferred share price. Generally speaking, the 409a value converges with the preferred price as the company is de-risked and moves closer to IPO.
dpiers··on BitTorrent inventor announces eco-friendly Bitcoin competitor Chia
My understanding is that your computer computes the answer to a difficult calculation ahead of time and stores the output up to a specified size (ex. 1GB worth of digits of pi) . Proof-of-Space asks you to respond with a segment of the output at a certain offset. The amount of time given to respond is less than the amount of time it would take to calculate the output, and so by replying you prove that you had it stored already.
dpiers··on Disney Ends Ban on Los Angeles Times Amid Fierce Backlash
I am going to write a letter to the City of Anaheim to inform them I am willing to pay double, maybe even triple, to lease their garage property.
dpiers··on Waymo now testing its self-driving cars on public roads with no one at the wheel
Your vehicle and face are recorded by half a dozen cameras on the self-driving car and uploaded to the local police department for the accident report.
dpiers··on Interview with Susan Fowler
The phrasing is confusing, but I think it means the boy knew he would be late if he helped, and the consequences of being late, but chose to act anyway.
dpiers··on The Impossible Burger
Impossible Foods' lab and tech is very impressive. It's like they are the company Hampton Creek pretends to be.
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