I agree with all the problems they note about large social networks: not being in control of the software, the data, the rules, and so on. I think this approach

I agree with all the problems they note about large social networks: not being in control of the software, the data, the rules, and so on. I think this approach solves many of those problems. But, some of other the problems with systems like Twitter and Facebook are inherent to the style of communication, and are not solved by just hosting your own Twitter and Facebook clone.