The idea is that with microg as drop in replacement all the apps would still work without the play services and be as good as. Putting your app on this additional store would cost you just a click. The vendors can preinstall that and ship google-less phones.

It will not happen, but if they really care about what they claim to care about, this is what they should spend the money on. Not sure if just putting a few on Google will help to get a better, healthier market.