Best way to trade coupons?

I knew one group and was really good (you could even take one coupon for free per day), I traded some coupons for cards, but forgot about it's name :/

first, as mentioned there a several coupon groups, where you can share your coupons and the community is happy....if you really would like to trade a coupon, place this offer in the trade-section of the corresponding game...but don´t expect that anyone give you anything for e.g. a pixel-piracy coupon...

Okay guys, I guess it will land in the coupon dumpster group =)