New customers can claim $1,250 risk-free bet by registering for a Caesars Sportsbook account and inputting the Caesars Sportsbook promo code BOOKIESFULL. This offer is not available to anybody that previously signed up for a Caesars Sportsbook account. It is also not available to bettors in NV. New users will also get 1,000 Reward Credits and 1,000 Tier Credits.