If you offer some other service, such
as hosting a mutligame highscore runup, where
people play in quick session over many games,
or something similar, that attracts many people,
on a popular site
you will find many indie gamedevelopers who would want to be included into that system.
Something like a "game modul" in a bigger system.
(as they can promote their game then)

But basically purchasing a newly developed game for 5€ is rediculus.