@Lyx @feld @nyanide @rher there's a few public https to tor gateways people have used for that, it's not too hard to write software that can work on a wildcard certificate *.instance.domain giving you infinite domains to work with too

but then people block the root domain including all subdomains, so you're stuck with buying multiples of the cheapest possible domain and cycling through them

and things like pleroma don't do multiple domains, so it's a bother