In my personal anecdotal experience, Amazon is quite good at extending Prime for another month (so basically only a few dollars) or refunding "sane" shipping ch

In my personal anecdotal experience, Amazon is quite good at extending Prime for another month (so basically only a few dollars) or refunding "sane" shipping charges. They are just about incapable of admitting that they messed up, though, and will promise you just about anything only to turn around and say "no, we can't do that" if it is anything that would actually cost them.