I'm the sole creator of hook.io. I actually beat Amazon Lamda to market by over a month before they announced...so technically Lamda is a clone of my service! :-)
We are making a bit of revenue now and users really like the service.
We could really use an angel investment to push development forward. I've funded development for the entire project for the past 13 months out of pocket. We have no debt and almost no overhead.
Someone should invest in hook.io!
FYI: it looks like they have a really generous referral program[1], so post your referral link (shameless example: https://hook.io/christiangenco?s) and I'll tweet the developer to see if you can get retroactive credit.
I'm a bit of a fan of putting unnecessary stress on our servers in a controlled fashion. This gives me a bit of wiggle room if we need to free up resources in an emergency...which still hasn't happened yet. :-)