Can a demon be bound to more masters? If not, then that is one reason you might want to be bound. Come to think of it, if you can be bound by more than two masters, it might be funny to watch what happens when two rivals learn they did it and order you to kill the other… Another one would be to get out of the Abyss. Tom and more powerful demons can apparently can get out when they want to, but the weakers ones apparently can not. To have some fun with the foolish mortal that summoned you? The more I think about it, the more reasons I can think off why you would not mind being bound by a foolish master who underestimates your power. I mean, Tom certainly appeared to get some fun from the that ring with his name spelled incorrectly (assuming that was the reason for it failing). He got a free ride to Astlan, a nice scuffle with silly bad guys while saving the damsel in distress, make a friend and get to have the high ground in an argument with said damsel. Ooo… and he got to blow up a ship owned by some really silly humans. I mean, it was even a win for the wizard who summoned him. If he had not been there, they would never have gotten the book back.
Tizzy, I think you lack imagination. Life is about more than smoking pipe in the Abyss and pestering Lillith. I mean that gets old just as quickly as floating on a cloud 😉