Do you agree that facebook banned all that promote ico's and bitcoin?
I think it's not a good option. ICO promotion is not a gambling or any other illegal thing. So there is no use of blocking ICO's. It will reduce attractiveness of people to the cryptocurrency.
But facebook is being use from fraudulent acts and facebook doesn't want to be an accessory to this that's why Mark Zuckerberg banned this. Yet I think this is an old issue and we still see ICOs advertisement on it and facebook bounty campaign is still on going as usual.