[dune]

If registered members have signatures already, then what *business signature advertisers* are paying for is the ability to have a signature, but with "different content". It's a political rule, rather than a functional rule. That's harder to set perms for. But I think what you're saying is you want the BSA's to pay the subscription so they're allowed to post this content in their sigs, but then remove the ability to use signatures AT ALL when the sub runs out.

The problem here is that the vB perms work where the most "lenient" perms take precedence. If you drop the BSA group from a user who's sub has expired, they still have the permission to use a signature from the regular registered usergroup. You'd have to turn off sigs for regular users for that to work...

Because of this "less-than-before" move you want to make, it will be tricky. Ideally, the "subscribe" and "unsubscribe" promotion actions of the subscription system should be different. So the group(s) they are moved/added to when subscribing can be different than the groups they are moved/added to when that sub expires.