You should expect the seller to maximize their profit however they can. Also, sellers that show no sign of ethics shouldn't be trusted period. Amazon is definit

You should expect the seller to maximize their profit however they can. Also, sellers that show no sign of ethics shouldn't be trusted period. Amazon is definitely one. Putting your stuff in the Amazon cloud worrying about deceptive practices or overcharging is asking the fox to guard the hen house. Pick a different provider(s) with a better track record. Alternatively, choose Amazon saying its benefits outweigh its deceptive practices. Whichever.