There is lots of software not specific to games out there that comes with very murky licensing when it comes to redistribution. That’s fine because it’s predominantly used for backend, but now we’re talking about distributing binaries (or source code if you’re python). Here [0] is the license for a closed source python module - what do I do if I’m using this? SQL server is widely used and not redistributable, and has lots of proprietary features as a more common one

[0] https://github.com/Azure/MachineLearningNotebooks/blob/maste...