GamersGate is an online video game store selling downloadable Windows, Linux, and OS X titles. Most of their selection is Steamworks games which later have to be activated through Steam, although some are DRM-free. They sell games from over 250 publishers and developers, and claim to have over 6,000 titles on offer.
GamersGate’s reward program awards virtual currency called “Blue Coins” on purchases, pre-orders, reviews, and other actions. These can be later spent on games.