Here in the Philippines, almost all people have facebook accounts. (even childrens! I admit as me and wifey created an account for our son! LoL). I think they are still testing it out and see what is the best! Applying the blockchain technology will be an advantage as it the future. That means facebook does not want to get out dated! Their purpose though is hidden but I dont think Mark will do something to ruin his reputation. I mean I know a lot of cases has been filed against facebook but so far, facebook is the most user-friendly social media account I have unlike Twitter.