It's more common in the emulation scene. The two emulators that Retron5 infringes on have licenses roughly based on MIT/BSD, but with no-commercial-use clauses added.

https://github.com/snes9xgit/snes9x/blob/master/docs/snes9x-...

https://github.com/ekeeke/Genesis-Plus-GX/blob/master/LICENS...