I'm genuinely curious of a real answer on this as I have the same concerns having registered on InfoSec.pub. Apparently signing up there means I am locked to that community? What happens to my account if they shutter? It's not like I can login using Lemmy.ca as my community.
As cool as this is, it's not fully thought through IMHO. There's a reason centralization tends to occur naturally. We are already seeing that with people in droves showing up on lemmy.world. for that matter who owns the instances? I'm lazy I'll get around to digging more eventually but right now this is a curiousity.
You forgot one thing. Fuck /u/spez