[rikroots]

> They are artificially dividing an open market by making some PC games exclusive to their store.

This sounds suspiciously like Amazon's KDP Select[1]:

Q. What does it mean to publish exclusively on Kindle?

A. When you choose to enroll your book in KDP Select, you're committing to make the digital format of that book available exclusively through KDP. During the period of exclusivity, you cannot distribute your book digitally anywhere else, including on your website, blogs, etc.

... I really don't like Amazon when it comes to the demands they make for publishing books through their platform. I am no lawyer, but the whole system reeks of wrongness. I publish a few books on KDP, but none have been enrolled in KDP Select - why should I give up Google Play, iBooks and a whole host of other distribution channels just to please the owners of the biggest distribution platform of them all?

[1] https://kdp.amazon.com/en_US/select