Yeah. This isn't the first time we've seen Facebook pull the rug out on something. Used to be that my news feed was absolutely full of posts from the Facebook apps/games platform spamming your whole friends list to join into Mafia Wars or FarmVille.

Eventually Facebook caught on that this was annoying and not a good use of the news feed, but if your business was dependent on it I imagine the effects were similar.

Having seen that happen before, building a company based on what Facebook decides to put in the news feed sounds insane.