QoL Feature Request - Have a way to avoid being auto subscribed to communities on signup

I'm yet another lemm.ee refugee looking for a new home. I signed up to piefed.social, and in the process was required to select at least three interests. That seems to have been used to sign me up to 58 separate communities, none of which I actually wanted to be signed up to! I can see how it can be a good way to fill new users' feeds and give them a starting point, but I'd really like to see an option to say "Don't add me to anything, I'll handle it from here". Unsubscribing from all of those was painful.