It ain't short, and it ain't pretty, but a quick scan through this list will save you the grief of getting ripped off. These companies made the sportsbook blacklist for one or more of these violations: 1. Not Licensed to operate an online gambling operation. 2. Hosted in the U.S., which is currently illegal. 3. Payout problems. 4. Business/financial problems. 5. Inadequate/ poor customer support. 6. Numerous complaints of bonus scams.