Bump, still looking.
It is only through people like me that people 'expect' a discount at all on amazon products. There are plenty of sites you can spend your bitcoins in exchange for amazon products as i have mentioned before on other threads, spendbitcoins.com btcbuy.info btczone.com. These guys exchange in a 1:1 ratio + a small fee, so why do you expect a discount?
Those sites allow a person to trade their bitcoins for Amazon $s. This offer is to allow a person to trade their Amazon $s for bitcoins.
That's quite a risky trade, and I can see why this trader would offer it only at a premium (a 15% "discount" means the person trading away the Amazon $s is really paying nearly an 18% premium to acquire bitcoins.)
This is one of those situations though where there are risks on both sides If the Amazon $ seller sends first, there is the chance the bitcoins will never come. There is also a chance that bitcoins are actually sent and then right after the Amazon $s are reported as having been stolen. It is really hard to do escrow for this, even escrow with arbitration as there is no way to verify the status of the Amazon $s or that delivery for purchases made with those Amazon $s truly occurred.
To someone who bought the Amazon $s using fraudulent means (carded transactions), the 18% fee is not much of a problem, so that's likely where a good chunk of interest in this will come from.