In any movement for social change there will always be philanthropists who co-opt and activists who sell out. Desperate for meaningful employment, purchased activists rationalize their choice as better than doing nothing.
But philanthropists like Gates and Soros know that co-opting activism is an important function for undermining resistance to the system of theft from which they personally profited. Without this palliative, young people in particular might get irate.
Just look at what happened in the 1960s.