Social networks Twitter, Facebook and Instagram banned the advertising of ICO projects, but no one forbade posts/tweets about projects, as well as repost and retweets. I can say that after this ban on advertising ICO projects for bounty hunters nothing has changed.
in this case, the signature companies will have a huge demand. Of course, YouTube gives the opportunity to advertise the company's ico, but it seems to me that this too will be a temporary phenomenon.