Amazon is in it for the very long run (they just turned a profit this year). Good luck trying to continue to dance this song to the tune of amazon. It won't last. It is likely a legal practice, and your background might blind you into believing that unintended actions by well-meaning consumers is a perfectly reasonable business model to profit from (at least it is more transparent in the beating industry). At least you know that you are in it against the house, in most cases.

Shame on you.