Aren't they just banning exchanges, ICOs and stuff like that? They have brought it on themselves with all their scammy offerings.
Bitcoin Talk has introduced the merit system for much the same reason.
Nop, check their announcement: "Cryptocurrencies and related content (including but not limited to initial coin offerings, cryptocurrency exchanges, cryptocurrency wallets, and cryptocurrency trading advice)"
Source:
https://support.google.com/adwordspolicy/answer/7648803?hl=en&ref_topic=29265