Google has 28.9% share, Facebook 25.2%, and Amazon has 10% and growing fast. Not a monopoly, and the incentive is there: if search results are consistently bad,

Google has 28.9% share, Facebook 25.2%, and Amazon has 10% and growing fast. Not a monopoly, and the incentive is there: if search results are consistently bad, people will stop searching as much, and revenue and market share decline.