Consumption doesn't mean that they pay for it with money. You can easily consume mario cart with out ever owning the game or paying money into it. Yes someone bought it, but even those musicians had to get there instruments from somewhere.
It's true that it's not black and white, there are matters of degree, grey areas, and different aspects of consumption/participation.
I think the basic point still stands though, that 'culture' has largely become something where it's assumed a minority produces and a majority consumes -- but this is not in fact an intrinsic aspect of culture, and it's perhaps only in the past 100 years that 'consumption' has become the dominant mode of culture at all.
I also think you can make an argument that in some cases ad ways video games are a place where this mode of culture is actually challenged _more_ than currently typical (let's talk about minecraft).
