Money Making Hack, this one's a must - Coupon Codes for Subscriptions

[hotshot]

I can't believe nobody has done a coupon off a subscription hack. Anyone that has a board that is successfully getting subscriptions knows how valuable this would be. If they make it for 2-4 weeks and stilll haven't subscribed, you could email out all the "registered" non paying subscribers with a coupon code that gives them a discount off the published rates.

This would be a killer hack. Quite frankly, Vbulletin needs to just implement it in the software. It's on every major shopping cart already.