Line Originator – Delaware Sportsbooks Looking for lines from your favorite sportsbook but can’t find them on VegasInsider? Maybe the line is on VI! Many sportsbooks do not have their own in-house bookmaker, and therefore, do not produce their own line, as that can be costly and risky. Instead, those sportsbooks partner with a line originator who creates, publishes and maintains a line for them. In the state of Delaware, there is currently only one primary line originator, which is The Delaware Lottery.