It would be interesting to test this mode. I work for free on the source code, and you can get that for free. But if you don't know what to do with it (i.e. build it) or don't want the hassle of setting up a build environment, you can always pay the project for that effort.

I'd argue this would need a special license deviation from the typical OSS ones to prevent distros from packaging it. Otherwise, this model would break down the moment an Ubuntu or Fedora decides to package the software and then the incentives to contribute some money in exchange for convenience dissappear.