We really liked Sins of a Solar Empire: Rebellion.  And it looks like we weren't alone.  Stardock have announced that the game has sold over 100,000 copies via digital distribution channels.  The publisher was previously worried that Steam might have cannabalized their direct sales of the game, but instead, saw it only supplement them.  Obviously with direct sales Stardock is getting a larger piece of the financial pie, so they wouldn't want to cut into that.  Thankfully this looks like an everybody wins situation.