If you read all the changes made, it's basically very vague rules. They are not distinguishing which one is actually allowed which any bitcoin-related ad could be subjected to not being allowed.
It's rather straightforward imo though? Crypto-related stuff that isn't released or isn't guaranteed by something (idk specifically what, or maybe it's just that it needs to be an "official" release) isn't allowed. Trading advice, signals, groups, and such are also not allowed. In this case, the ads that would pop out are most likely CEXs and the like, the ones that have a theme of being "regulated" by a central body. I wouldn't exactly expect a "Bitcoin" ad itself, maybe one that leads to the whitepaper or something, since most would be taken by exchanges and companies and the like..