Ironically, because Facebook requires in-game payments to be processed through their payments platform (for which they take 30%), much of the feed spamming specifically for games is allowed. Take the case of Slotomania - a mobile app that just sold for $4.4 billion last week [1]. Unless you manually uncheck a box in the UI each and every time it is presented - and I'm not exaggerating here - this game will wind up publishing something to your news feed approximately once per minute while you are playing the game. They printed $4.4 billion out of thin air using nothing more than aggressive spamming techniques.
News feed spam that makes Facebook money is allowed. Spam that doesn't is not.
News feed spam that makes Facebook money is allowed. Spam that doesn't is not.
[1] http://www.bloomberg.com/news/articles/2016-07-30/shanghai-g...