Good Old Games (now GOG.com) has quite a few titles that are old and out of production, made compatible with modern systems and sold in DRM-free digital format, in addition to whatever new stuff they can get (also DRM-free, to my knowledge.
I'm sure their payment agreements with publishers are much like Steam's, just with different exact terms and different amounts of money per game due to the age of the games in question.
Good Old Games (now GOG.com) has quite a few titles that are old and out of production, made compatible with modern systems and sold in DRM-free digital format, in addition to whatever new stuff they can get (also DRM-free, to my knowledge.
I'm sure their payment agreements with publishers are much like Steam's, just with different exact terms and different amounts of money per game due to the age of the games in question.