[greffer]

> I personally want to make a living making software products, not services. GPL doesn’t seem to offer me a way to do this.

These two things are pretty unrelated.

For Android apps, a common model to have a paid version in the play store and still publish the source code on github with GPL. Here the GPL actively protects you against somebody coming, doing some minor modifications and then pushing their own paid-for version to the app store while not publishing the source code (which they could easily do with other licenses).