There are more phone users than PC users though. Stats estimate a 4 billion difference. Can you imagine the costs of having just an increase of 400k users flood

There are more phone users than PC users though. Stats estimate a 4 billion difference. Can you imagine the costs of having just an increase of 400k users flooding your shops and online forums for help because of one of these third party stores/browsers? It makes sense if you could do this in the very beginning (as it was the case for PCs) but for smartphones that were closed since the beginning (it is downhill in the cost/revenue world)