We don’t want to make more work for the moderators.

That said, perhaps account customization (thinking specifically of using a picture) could be tied to donation.

But it would create its own rat’s nest of tracking how long ago someone donated, let alone which donation goes to which account. (My donation came from a different email address than the one I’m registered under at OT – swhs(dot)geek says more about me than the address that’s just my name, but that’s the one setup in PayPal.)