Comment by siliconc0w

IMO, if your market share is bigger than ${some number}, you shouldn't be able to deny service without a documented reason, it should have some sort of time-to-live (i.e 1 year), and there should be an appeals process. In a functioning marketplace, companies would be naturally incentivized to care about customers but that stops working in uncompetitive industries (which currently describes most of the economy).