https://www.coindesk.com/facebook-banning-advertisements-bitcoin-icos/
"Social media giant Facebook has unveiled a new policy that bans advertisements involving bitcoin and initial coin offerings, among others..."
Yes I agree, Facebook also want some profits out of this crypto companies; however, it will affect the future bounty campaigns of other ICOs. Such actions might include tracking of posted pictures and videos from the ICOs; thus, it will tighten the Facebook campaign of other ICOs OR facebook would introduce auto ads over ICOs information. If this will be the reason for Facebook's plan, I think this is not all about negating the ICOs - it is more on the inclusion of Facebook party in crypto (embracing technological diversification).