Of the points, not allowing others to make money from a fork could be difficult. You can ensure that a fork stays free, but iirc it’s hard to stop anyone making money. Although I’m hesitant to suggest this, you might want to look at the license for Gnuplot (it’s not gnu as in GNU), which is imho the least free license commonly called “free software”, it effectively prevents forked projects. In which case another question might be, do you want it to be free software? Is the gratis aspect more important?

There’s also PonyOS (https://www.ponyos.org/) They wrote their own kernel, so it’s not Linux, but it is Unix-like.

Me too, I’ll stick with good old HannahMontanaBSD.

and GNU?