Facebook banning all cryptocurrency related ads is a double-edged sword. On the one hand, this will protect the common layperson with no knowledge from ico scams and phishing sites. However, it will also deter the development of reputable and legit startups and possibly inhibit the mainstream adoption of Bitcoin and altcoins, not to mention the loss for bounties. Facebook banning all of it in such a fashion also send a negative message about cryptocurrency as a whole... This will have far greater reaching implications than anyone of us can foresee at this time.