I think the triggers are likely to die down as the CEOs gradually stop sawing at their own genitalia.

What you have here is a start, but the barriers like having to find all the niches through searching mechanics that send you to a website and back to a client are always going to be a sticking point. There's not much support on any client to just get a list of communities on the instance, much less a different one.

If they come down or the instances centralize enough that it doesn't matter we'll see some growth by enticing other users because it'll be functionally the same thing to them. But there are some definite hurdles in getting here, and there's no incentive to advertise (read $) other than grassroots.