@Gargron bringing this back up, imo you *really* should consider enforcing your ownership of your software's branding - people are spinning up instances with confusingly similar names to your own instances. example:
See if you can get someone from one of the free software associations (like @conservancy) to advise you on your rights here.
@jon @conservancy I don’t think anything can be done. It’s not like I could buy up all similar domains. The ship has sailed in 2017 when mastodon.cloud, mastodon.network, mastodon.xyz etc have popped up.