Yes. The problem I have experienced from a customer service perspective is that marketplace sellers who ship dangerous or otherwise clearly defective/scam produ

Yes. The problem I have experienced from a customer service perspective is that marketplace sellers who ship dangerous or otherwise clearly defective/scam products (eg I had a power wallwart explode on first being plugged in) just respond to any and all complaints by processing an immediate refund. This doesn't seem to get picked up properly by amazon and presumably their margins are good enough that this strategy works for the sellers (at least for a while).