The domain names can be reused. 3 days after the domain names are created, both the domain name and the feedback comments are hard deleted. Since it is a hard delete, there's nothing that stops the domain name from being reused again.

I thought about this a bit and I can see this being confusing and possibly dangerous though. For example if somebody shares a domain they created, and 3 days later somebody visits the domain but it's a totally different domain.

Thanks for pointing this out! I will think about some ways to solve this.

Thanks for the explanation.

Perhaps a quarantine period — say, 1 year — will work, the same way e.g. phonenumbers are recycled?

Their About page suggests that it's just that the data will be deleted.

Thanks, I hadn't read the About page.

»After 3 days, all data for the domain (domain name, description, feedback posts) is hard deleted forever.«

A domain name that is “hard deleted” can't resurface, can it?