I don't quite understand why would they ban advertising certain type of services on google but allow the same type of ads on youtube (google owned). That's just double standards, I'd expect any ethical-concern actions to be taken on the group level, not separately for each platform.
Good to hear they're shifting towards more crypto-friendly stance though. This adds legitimacy to all the cryptocurrencies businesses that are allowed to advertise.
Google's original restrictions, which it announced in March and rolled out in June, were intended to protect consumers and included initial coin offerings (ICOs), wallets and trading advice, which are still not allowed.
Maybe it's for the best. I'm not gonna cry about it. Although, similarly to regulated exchanges, they could allow SEC-compliant ICOs.