Everything said here in this comment is theoretical and in Minecraft.
If they are shutting down but haven’t shut down yet check to see if any other sites are doing open signups for refugees on your sites forums. That’s how I got elsewhere before baconbits shut down, with it being my only tracker.
The community really is a community and when they know in advance a site is shutting down, they usually get together and put out invites on that sites forums for others to use as an “escape hatch.” They will still want to see an account in good standing.
Also, take screenshots of your account info so when the site shuts down you can still use it as proof you had an account in good standing. Many sites still have open sign ups and good past accounts go a long way to being let in. I’m not sure if Lemmy has an open sign ups thread like reddit did.
If you can, try to “diversify” and get on a handful of sites, choosing ones particular to your interests, of course.
Oh I’m sure there will be. It will be technically difficult (but not impossible) for them to allow other app-stores and sideloading but have the hardware and software be different enough in both markets to not have some slip through.
I suspect there will be lots of hacky shit for this.