Twitter Inc. said it would ban crypto currency advertising, selling tokens. Twitter joined Facebook Inc. and Google's parent, Alphabet Inc. to ban the sale of crypto currencies.
Outdated and not accurate. Google doesn't ban advertising related to cryptocurrency anymore, Facebook doesn't really do too (maybe about ICO but everything about "normal" crypto is fine (normal=everything crypto that isn't a crap)) Twitter didn't say It would ban, it already banned since several months now.