alt Hacker NewsA monopoly store is charging (according to sibling posts) about a 50% tax to its suppliers, and will ban them if they sell their products for a fair price anywhere else. The tax percentage keeps increasing over time, as the monopoly uses this policy to prevent anyone else from competing on price.
That’s clearly in violation of antitrust laws.
50% "tax", or 100% markup, is the typical reseller markup for consumer products across the market, and anti-undercutting clauses are also universal.
Every bit of what you're describing is the way retail distribution works across the industry in general. Amazon isn't doing anything out of the ordinary in any way.