Sadly (perhaps not sadly!), I don't want to use vBulletin.
I'm wondering if there is a way I can achieve the same or similar thing with Xenforo? Or at least I'd like to get a picture of the ways I could sell/control access to the forum.
DAP has a plugin system:
I'm not a programmer, but from I can see, it would allow a notification to be sent to a 3rd party when a user signs up for a product. I think the next version of DAP will also allow a notifcation to be sent when a user cancels/doesn't pay.
I see than Xenforo has XenAPI - if DAP is able to send a notification, could a user be created/updated and given access to a specified forum?
I sort of feel that some of this is beyond me, so I'm wondering if anyone has done it. I'm guessing using this combo I wouldn't get the automatic log in/log out that DAP/Vbulletin integration offers. (Sadly), I feel vBulletin might still be the best option for me in these particular circumstances.
Any suggestions or insights are appreciated!