Amazon keeps constantly increasing fees in their marketplaces or warehouses, then there is a brutal competition on price via algorithmic repricers, so resellers

Amazon keeps constantly increasing fees in their marketplaces or warehouses, then there is a brutal competition on price via algorithmic repricers, so resellers try to compensate wherever they could. Increased price could be also a consequence of Amazon kicking out cheaper sellers and the remaining ones without doing anything by using a repricer would set a higher price, not mentioning some advanced repricers using game theory to find equilibrium as well.