I'm ok with ads on those few mobile games I play. As long as they are unobtrusive.They don't necessarily even have to offer anything extra to me for watching them. I'm all in for supporting the developers who go through the trouble creating those games.
But there are many ways to integrate those ads to the game. Main ways being displaying small banner ads all the time on the edge of the screen and having full screen ads popping up every now and then.