Obviously, Google is doing it under the pressure of the regulators.
I don't think so that they are under the pressure of the regulators. They might be doing this base and according to their own will on what they can see the rampant of cryptocurrencies and the scams can't be denied too.
it is very disturbing when Google itself spam my phone will several scam ICO projects
This will happen if you are going to turn on your notifications to them or you will subscribe to their updates. That's why I don't turn it on and it's better just to read when you have time on what's currently happening.