That's the thing, They are making plenty of money in the big league, If not they wouldn't be releasing game after game. When it comes to money someone is clearly earning big bucks. Now if that is not trickling down and being fairly divided by those who make the games it comes as no surprise as there's no shortage of greed in the world but the industry itself is one of the biggest money making entertainment industries out there.
By what mechanism would you expect money from, say Rockstar, to "trickle down" to the less affluent studios?
If you buy a dirt cheap key (on release) from a less well known studio, it isn't Rockstar you're hurting. I'm sure R* made a killing on GTAV. And the COD devs probably make a killing on that too.
But do other studios always strike it rich? And if they don't, can they go to Rockstar and ask for a slice of their income?
I'm really not sure how this trickle down thing is supposed to work.