Currently, only Caesars Casino WV offers 25 free spins for Starburst when you register, with each spin valued at $1. For all other states, the Caesars Casino bonus is a $10 no deposit and a 200% match. Still, BetMGM, DraftKings, FanDuel, and Borgata all offer no deposit bonuses that can be used to play either Starburst or even Starburst XXXtreme.