The rules are different, like in this situation, for companies that are near to or in a monopoly situation. Last I checked Android had over 85% smartphone market share.
Not to mention a situation where a huge megacorp has basically driven every other smartphone OS out of the market by dumping[0] its software on the market and then insidiously making it less free and open with every release.
[0] https://en.wikipedia.org/wiki/Dumping_(pricing_policy)