I think on the ICO it wouldn't affect in any way, most likely there will be changes in the Bounty. But in my opinion there is enough other resources for campaign. It possible that Riddle would be more popular in Bounty companies. I'm in the German project Vreo.io  https://bitcointalk.org/index.php?topic=2898738.msg29810876#msg29810876 And there besides Facebook there are Medium, Twitter, Youtube, Telegram, Blog articles, Signature, Linkedin campaigns