Sure, but we all know costs of a litigation which most sellers on Amazon can't afford - Amazon takes most of the profit, 15% default fees leave very little to n

Sure, but we all know costs of a litigation which most sellers on Amazon can't afford - Amazon takes most of the profit, 15% default fees leave very little to normal sellers, usually under 5% as the (re-)pricing competition is now algorithmic, resembling HFT. Then if you want to have your product featured on Amazon (meaning your offer will be the default one even if it is more expensive than somebody else's), you need to contact the category manager and it's up to their discretion to decide (which reeks of a high potential of corruption/profit sharing etc). On one hand it's pretty cool you can automate price responses and very beneficial to the customer, on the other the game has an increasing risk of being rigged.