SMF Shop / ST Shop Credits?

[Senkusha]

I am poking around the Store, contemplating what I'd like to eventually sell in my store when I ran across this.  I do have ST Shop installed (since SMF Shop isn't compatible with 2.1.4 (to my knowledge), although, it would be nice to have a single packaged solution...) anyway...

What does _this_ do?

SMF Shop/ST Shop Credits Give:

Also, How difficult would it be to apply "credits" based on forum participation to reduce the cost of a product?  Like a coupon of up to 10% or 25% off?  I don't have a definite vision in my mind yet, but I do see as how a mechanic like this could prove beneficial towards driving sales.

[SMFHacks]

SMF Shop/ST Shop Credits Give basically gives credits to use in SMF SHOP/ST hop if item is purchased


Currently do not have any integration at the moment. That wouldn't be that hard to do create a coupon maybe an two hours of work since interface and logic