Maybe you’re going to be correct, but I think that these closed platforms are all going to do what Facebook has and slowly become places that a lot of their users no longer like. In that environment I think someone is going to come a long with a decentralised form of social media the way e-mail or a phone works that is easy enough to connect through that everyone in Denmark is going to be on that and not everywhere else.
I think the only reason it doesn’t exists yet is because you sort or needed a world where GitHub pages, and Dropbox, and so on figured out a way to sell their platform IRON through the use of open APIs. I think it’s coming though.