I registered to topishare as one of its first users just after its beta launch in March. I am not a real social media fan, having shut down my facebook, twitter, and instagram accounts already a long time ago. But I wanted to give topishare a try, as it promised to keep my privacy, to give me back control (I really dislike FBs algorithms), and to provide a place for topic-based discussions. The site looks clean and slick, and reminds me of pinterest. You can join (or create) so-called Kingdoms, that revolve around a variety of topics. I've created one on Social Innovation and it already has (right now) exactly 50 members that are actively posting and sharing, which I think is pretty cool.