They should pay contributors few millions of dollars each. If they benefited from it they should give meaningful reward. Mouthful words won't suddenly change you from being simply a leech.
But that should be millions per developer. Maybe developers should lobby RIAA, so that companies like Amazon would have to pay royalties for every line of code used. You know they make billions of off that work and yet some developers can't afford even their own place to live. This exploitation must end!