I don't believe paycoin has failed, sudden dumps are always followed by pumps, it happens all the time. There are still issues with paybase but once you can pay paycoin to amazon via a paybase exchange rate, it will give the opportunity for people to cash out there virtual currency without fees or trying to sell on localbitcoins etc. In theory it is still a good idea.
So exactly what is in it for Amazon to take a worthless piece of shit scamcoin?
Nothing at all, that is not how it works, you pay paybase XPY, they convert it to $ at the current exchange rate and that is paid to amazon.
What's the point of that? Why would people go through all that hassle rather than directly paying Amazon with fiat?