> Sometimes I wonder whether it'd be possible to earn a living off mammoth. Although there's an option to donate - I currently get a grand total of £1.15 a week from regular donations - it's not something I push very hard. There's no shame in making the source available but using a license that requires payment for commercial use, like the Prosperity [1] license. [1]: https://prosperitylicense.com/
For example this clause, phrased like an order, does not make sense:
"Don’t make any legal claim against anyone accusing this software, with or without changes, alone or with other technology, of infringing any patent."
You can't give orders to people in a license or other contracts. You can only describe conditions.