Starting 31 March, Amazon is going to require that all third party sellers on Amazon.co.uk, Amazon.de, and Amazon.fr sell a product at the same price as a seller's other channels. For example, if someone sold on Amazon.co.uk and Ebay, the prices on Amazon.co.uk have to be below the selling price on Ebay. The policy includes web retailers with their own websites.
I picked Ebay in order to demonstrate the absurdity, but I honestly doubt that it will be included in the new policy. Even so, this is gonna suck for the smaller sellers. Amazon takes a huge commission from third party sellers. (Amazon also takes a cut of the shipping fee, so it's actually a double commission.) Margins are tight, and competition is fierce. If sellers can't raise the price to cover Amazon's extortionate fees, then I wonder how many will stop selling through Amazon.