The captation of knowledge is made possible in large parts due to some FOSS developers using non-copyleft licenses. If the receiver has no obligation to share,

The captation of knowledge is made possible in large parts due to some FOSS developers using non-copyleft licenses. If the receiver has no obligation to share, and makes money off of a product they build on top, expect them to not share anything. At this point non-copyleft licenses are a problem, and shouldn't be used anymore. Don't wait for a foreign group hellbent on maximization of profit and on which you have absolutely no control to do something; use (A)GPL