To me this seems simply anti-competitive. Could Amazon say I cannot make purchaess with a Mac, or Xfinity internet, or a logitech keyboard, or while wearing Levi's jeans? IMO they should have no right to dictate how I make a purchase. Sure, I am not allowed to mass harvest and distribute their data (such as the prices of every item), but for the purposes of making my own best choice I should be allowed to collect datapoints that I could easily and legitimately find on my own .