Yesterday, Steam chose to remove the ultra violent game Hatred from their Greenlight platform. Today, it was returned back to Greenlight. This link from Eurogamer sums it better than I can.
What I find interesting is how much power this shows Steam has over PC digitial distribution games. Particularly for smaller shops like Destructive Creations, the developers of Hatred, the ability to get distributed by Steam could easily be the make or break for a game's success, regardless of the game's quality. While, unlike Apple's App Store for their iOS devices, Steam certainly isn't the defacto distribution point for PC games, it certainly is the biggest distributor. While some my eschew Steam for their original decision to take down Hatred, it is also their ability to adapt and put Hatred up that continues my affection for Steam. I'm not sure if I agree with Steam's original decision to take down the game, but I can appreciate their ability to reverse course when they realize they're wrong.