The only thing I bought on here were gridseeds when they first came out (which was insane, since they were $300 each and I got 5, which was a small qty at that time), and apparently I didn't earn any rep from that.

Since these gift card sales take place in icq or skype or whatever, even me commenting is useless, so I don't really care what anyone thinks. Try a card or not, I was politely asked to leave feedback on how my purchase went, that's all.