Purse.io gets most of my BTC business. I consistently get 20 - 25% off all of my amazon purchases. You should really try it if you haven"t already.
Never heard of them before, but: that's a very smart system. Thanks for the heads up.
I'll read into it to find out if I consider them fully trustworthy. If that's the case, I think I'll use this regularly in the future.
EDIT: hm. just realized, this probably only works with amazon.COM, so shipping limitations (e.g. to Europe) might apply.