问题
Is it senseful and legal to use Google Play Game Services for anything else than a game?
I think an app that can upload images could have leaderboards (weekly likes) and achievements. Or a language learning app could also use these features to make the learning process more fun.
Why are there no apps using these features? Is it not allowed? Or is the problem, that the app would be listed as a game in the Play Store, even if it is not a game? Will Google ban such apps?
来源：https://stackoverflow.com/questions/30287139/is-it-senseful-and-legal-to-use-google-play-game-services-for-non-game-apps