Yes i have heard that facebook will regulate the advertisement of bitcoin and cryptocurrency.
This is great news for cryptocurrency in the future.
It will strengthen the cryptomarket.
I personally have no idea about it, but if it is true then no doubt that it is a big decision and in favour of bitcoin to grow more and more, I think that facebook is one of the most popular and good way of introducing different ICOs in different places, i think that people will appreciate that decision taken by the facebook management.