[schroeding]

Apart from the cost, this would allow bad actors to reregister domains, once a shop is expired, though. Subdomains do not.

[snowwrestler]

This is true. But this risk should probably be weighed against the risk of a bad customer getting your entire root domain deny-listed.

[bo1024]

Or preregistration domains for nonprofits that aren’t on your service (or not yet).