"scarcity creates value" is true in general but don't take it too literally. It depends how you define the perimeter, hence it doesn't work here. I already have friends I've introduced to Steemit and after 2 articles they tooke their business to trybe.one
There's scarcity for RC in steemit but there's no need for anyone to socialize on steemit as more or less the same thing can be done on many other platforms (weku and trybe are two of them)
Let them leave, competition is good for this space. Though I have to be honest, if these places (WeKu, Trybe, Smoke) think it's going to be a piece of cake developing a working cryptocurrency social media site, they're in for a shock. Can they do it with Steemit having 2 years head start on them? Maybe, with how dysfunctional the development here seems. It remains to be seen, but at the present, Steemit is the best out of these systems by far.