I always thought the economics of drop shipping would never work but looks like it is profitable even with a processing middleman.
I am curious to know what kind of inefficiency is being exploited here, because this seems to be from one online retailer to another (unlike ebay). I have a couple of guesses but I would like to know if there are others:
* information gap on the customer side (doesn't want to cross shop)
* product won't ship to target market through competitors website
* competitor's website wont accept user's preferred mode of payment
* wants a competitor's house-brand product on amazon
* some kind of customs loophole