> Amazon doesn't require exclusive contracts. ... yet. What's to stop them from doing so when they've killed off a few more of their competitors? > If Amazon

> Amazon doesn't require exclusive contracts. ... yet. What's to stop them from doing so when they've killed off a few more of their competitors? > If Amazon is not serving the needs of those authors, they'll be interested in switching horses. Assuming there are horses left which are viable to switch to.