But no license I've seen so far said "you (or the author/s) MUST distribute this to everyone." Once you've distributed the app, the licensee gets the rights, sure; but there's no requirement "you must grant license to anyone who asks."
This is somewhat unintuitive - and also mostly moot, as anyone who is already granted a permissive license may also distribute the app themselves - but with open-source apps going for this, it would become "here's the official way of supporting the author, and if you dig a bit, here's the cheap but legal way of using the app just the same." Sometimes all it takes is for the "will support the author" path to be the path of least resistance...
In other words, foo/bar the original repo might be paid access, xyz/bar the exact copy might be gratis; the only difference being "but foo/bar is the original author's version"
I welcome this step.