I heard that news from one of my friend yesterday and I wondered that why the owner of facebook has banned it as there was a huge profit to him from these type of advertisement. I think he done a mistake in this decision as not all the crypto projects are scam. It is a bigger platform and they have to manage that field well. They have to manage in a way that they have to give chance to those projects for which they will be sure that they are legit. They have to investigate for them.