Then again, as a meta comment I will point out that the fact that both you and I so clearly notice this suggest that we are following these updates much more closely then most of the folks here.
It might not be so well known, but I found http://www.deepstream.io to have a relatively similar feature set, without having to deal with bad support (if it bothers you, just fix it yourself) and high prices, since you are the one who picks what suits you best.
I have yet to see a platform that's as flexible and robust, with the added bonus of being real-time.
YCombinator shouldn't let companies use Hacker News as a marketing tool, at least not to the extent Google does.
The engineering response is pretty clear-cut. Polling every minute from an uncached SSL connection is expensive, don't do that. That's pretty obvious and the author admits this was a mistake. The complaint is about everything that's not the engineering part - support & communication.
I'm sorry, I can have 50'000 devices poll every minute via an uncached SSL connection on my 16$/month server from Online.net, including bandwidth and traffic costs.
I'm not sure what you're smoking, but I want that, too.
Seriously, at Google, TLS is terminated in hardware, and bandwidth costs less than a cent per terabyte for ISPs or Google.
The costs that this caused are basically nil.
(This, btw, is why I'm using kubernetes on rented bare metal, paying 30$ a month, for what would cost me, including traffic, around 900$ (Google Cloud with rented servers) to 63'000$ (Firebase) a month.)