It looks like Facebook's flirtations with pro football are over. The social network was apparently in discussions with the NFL to livestream Thursday night games, but is backing out of the deal according to Bloomberg. The killer? Commercials and the NFL's insistence on a TV-style advertising system for its streams. From the sounds of it, Zuckerberg and Co. weren't exactly keen on early morning London-based NFL International games that come part and parcel with the package, either.