Our forum has a $10 paywall. Or, rather, it did on IPB4. It was a simple matter to channel a new registration through the store to pick up the $10 charge and ensure it was paid before the new user had access.
I cannot for the life of me work out how to replicate this under xF. The Account Upgrades system doesn't allow for fine-tuning at this level, and the only add-on I can find which offers paywall functionality doesn't let you set which of your User Upgrades is the paywall, so the new user gets to choose from any or all of them without any guidance as to which one they're supposed to get.
Is there some jiggery-pokery I'm missing? Some hotwiring I can do behind the wheel to re-open my forum to new members? 'Cause at the moment without a viable paywall we've had to disable registrations and we've got a queue a mile long hammering at the gates