I have no idea what the motive would be. But I do know that without financial incentive, it is difficult to believe that Android development will continue outs

I have no idea what the motive would be. But I do know that without financial incentive, it is difficult to believe that Android development will continue outside of Wallet-supported countries. They could still use in-app banners, but those revenues tend to be abysmally low vs. IAP and in many cases will destroy the user experience. There may be a few people that code them for pleasure or practice in these countries, but if there is no money in it, people will find better things to do.