Hmm. The name of the social network please?

It will depend on how it will work. Example is Twitter. So how are you going to use a crypto currency on that kind of platform which really doesnt need that?
Payment for what?
Facebook is creating something like Tether and why the hell should I invest with it. With the same conversion rate in USD there is just no sense. I will just better buy Tether than go to another platform which will just do the same.