https://en.wikipedia.org/wiki/Philosophy
https://en.wikipedia.org/wiki/Intellectual_history
https://www.amazon.com/1001-Ideas-That-Changed-Think/dp/1476...
The notion that a philosopher would hoard his ideas because he wants to get money from them is pretty much antithetical to the field.
You seem to be referring to ideas as in, ideas about how AI systems should be designed.
Different scenarios, for sure.