Facebook has started blocking anything they don't agree with or in other words can effect their profits. I tried sending a friend the site I use to hold my BTC since they give me interest and they would not let me post the site to the thread (https://freebitco.in/?r=3152479). We have to remember that they are very much a for profit company and as with most major companies they will do a cost analysis and usually make the call that it is a cost benefit to do if they get fined. It seems like it is always about the profit and not taking care of the users.