I've watched my grandma play a mobile game a few days ago. It has been a simple word search game. A level takes her about 2-3 minutes to beat. Every single time she beats a level, she is getting 1-2 30 second advertisements that she has to sit through. Its honestly so sad to see. Thankfully she knows that all mobile ads are bullshit and how to close them, but still... This market is shameless.