Ive got this idea I wanted to put forward for your review.
Trialpay, Super rewards, Gratis pay etc are all virtual currency sites. At present they all take advantage of the social network world by offering one click integration.
Members complete offers and in return earn points. The admin earns money for every offer completed. What you offer in return for the points is upto the admin. On the social network sites such as facebook they are a popular way for members to get points to spend in games, however forums could offer mods, styles etc in return for points.
An example of this on a forum would be:- Instead of paying $10 for a key, they could complete offers to earn points. Once they have enough points these could be exchange for a key.
You earn more then the $10, as you set the exchange rate. Members dont have to pay anything, just complete a few offers.
I really do think many forums could take advantage of this system. Ive certainly got a way to use it on my forum that im currently developing, but I just dont have the php knowledge to create a callback script and incorporate this into vbcredits.
VBcredits said regarding the intergration:
In any case, integration with vBCredits is pretty much just manipulating the credits column on the vbulletin user table.
I hope I haven’t waffled on to much!