Doesn't it work? You can choose Amazon gift cars, don't you? And you can ignore the docs and just send the buyer your gift code straight awaw.

All you risk is the buyer scamming you with a claim he didn't recevie the proper gift code as stated in the docs by email and redeem your gift code anyways.

But what I observed so far during auch trades is that robots are 100% honest so far and probably didn't read the docs at all.