I think that is true. Could be because instances like Lemmy.ml don’t let new users create an account, beehaw unfederated other instances and kbin also has some problems with federation… So, only Lemmy.world can really thrive I guess. Other instances I have not seen that much. Maybe sh.itjust.works (or something like that) are thriving but I don’t know.
Oh, my bad. I thought I read it somewhere that it was having some problems because of CloudFlare protection so the site would not go down by the flood of new users.