Self-exclusion, player limits, and cool off periods.
Responsible Gaming and Patron Protection on DraftKings Sportsbook and Casino - Overview (US)
How do I set wagering limits for DraftKings Sportsbook and Casino? (US)
How do I limit the amount of time I spend on DraftKings Sportsbook and Casino? (US)
Can I set limits just for Sportsbook? (US)
Can I set limits for just Casino? (US)
Can I disable the Casino? (US)