Contrary to popular belief, Satan doesn't do his job very well. The TV shows he worked with usually ends up being a flop (Whitney, Saved by the Bell: The College Years). And in multiple occasions, he fails at convincing Nerdcore to do bad deeds, only to be beaten by Hip Hop's shoulder devil.
In Season 2, it was shown that he currently spends his time by playing a poker game with other recurring characters such as News Newsman and the Rat Protector. He plays dirty and even resorts to physically injuring his playmates.