Unified libary, any platform.
Own it, forever!
So you bought an app from a search engine and tech monopoly company. One day they decided to get rid of a developer. Now you can't even get a refund, or even find and download it from the store?!
Own it crossplatform
PC, Linux, Android, and any other future platforms*
* Note: Sometimes, some things aren't easy and extra work might be needed. Developers still have a right to ask an extra amount, but not at the cost of the whole game. More info.