"Figured it was the best place, and so far it's working out! They're going to make toothpaste with my face on it!"
Booster had stopped a few minor crimes, and gained a small amount of notoriety. A guy named Dirk offered to manage some product placements for him, so Booster had been working that angle while in the city, too.
He had to make a slightly more than just comfortable living somehow.