We always knew that Steam was a massive endeavor, continuously filling up the treasure chests in Valve’s basements. But we never really knew how big a chunk of the market it has, and now Stardock, one of its competitors, says that Steam has about a 70% of the digital distribution market share on the PC, which, as Kotaku points out, is about the same market share that Apple has in the digital music download sector.

This can only add to the criticism that Valve and Steam should be separated into different companies. But don’t count on that any time soon.