They won't ban posts or pages dedicated to crypto, because if you don't strictly search for it yourself, you won't be seeing it, so it's not a problem. Ads however may pop up everywhere, even if people aren't necessarily active in that specific field, regardless of how advanced their algorithm is, and that's something they no longer want to happen. I don't completely agree with these measures, but I do understand the external pressure forcing them to do this. On the other hand, the majority of the crypto related ads were pointing at malicious entities, and that is now gone. Maybe, maybe if crypto gets more regulated, these policies might change for the good, but that's something that could take years and years before we see it change....