[pjmlp]

This is not the case with most open source software.

Actually the majority of corporations are leechers, using it as "free beer", only paying back if they really have to, as many corporations don't use software without support contracts.

Or happen to have some FOSS followers taking business decisions.

Otherwise, I can tell you from my experience working on Fortune 500 consulting projects, very seldom is any money or contribution given back.