Facebook know better know myself than me. In future people will realize that how it really affecting their lives because they are playing with your minds. You like something so you searched or discussed about it but you don't want to buy it but they are putting pressure on your mind to buy the thing by consistently putting adv. in front of you. This is reason Mark Zuckerberg bought whatsapp as well as instagram so that he get more information about the people. Steemit is better than any social media sites..that why they are banning cryptocurrencies ads because they feel insecure from the increasing popularity of steemit. Steemit is freedom and future.