Last week Coin Center published a primer on app coins. It is very good.

I particularly like this part:

Open platforms have proved difficult to create because it has been historically difficult to monetize them even if they become successful—by nature they are public goods. Now, however, the developers of a cloud storage service can incorporate a scarce access-token, an appcoin, into the design, distribute that token to users, retain some amount of the token for themselves, and if the platform proves popular, the token (alongside the holdings of the developers) will grow in value and remunerate the developers for providing a public good. This new model challenges the concept of equity as traditionally understood, and carries entirely different risks and rewards.