Question about the "Other Offers" for K stars

HazelnutLatte

In my "Other Offers" section, there are a bunch of games that all say "Awesome--play for free!" and "Play the cool game for more than 2 minutes." If you play the game for more than 2 minutes, you're supposed to get a K star. But it doesn't matter which game I play or how long I play it...I've never gotten a star from any of them. Has anyone ever played one of these and gotten a star? Am I doing something wrong?