I see folks saying that it is good for consumers because Amazon products are better quality that the other sellers who tend to be unreliable. However, we are mi

I see folks saying that it is good for consumers because Amazon products are better quality that the other sellers who tend to be unreliable. However, we are missing the long-term impact of this - (a) It will slowly kill competition, at which point Amazon products no longer have to be better quality. (b) It kills innovation because anyone who wants to sell stuff online knows Amazon is going to copy the product soon enough. Why is this not an antitrust case? Amazon has the monopoly on online retail I assume, so isn't ranking it's own products higher an antitrust violation?