First, you should know the information when making such a conclusion. Facebook now prohibits placing ads related to cryptos, ICOs on their social networks, discussing cryptocurrencies and the ICO is still allowed, and Facebook can not ban it. The reason Facebook forbids it is that Lending models, as well as Ponzi, use Facebook to trick people who do not have knowledge about cryptos to invest, most mainstream ICOs do not use Facebook ads that create bounty campaigns to promote.