Facebook said it will block all ads on its platform that involve digitally encrypted currency, including bitcoin, in an effort to discourage advertisers from promoting ads that the company calls "financial products and services often associated with misleading and deceptive promotion" .
This are the right words from it.
It happened lately where they were creating projects which really dont exist.
This people gets millions of dollars by just creating a fake team, whitepaper and just a website. All that with just a little capital but they will get ten fold afterwards.
Many people might have reported about this that is why Facebook already made the move.