It is showcasing its industry-leading legal betting app in Pennsylvania and more than a dozen states. Why Caesars is the best sportsbook in PennsylvaniaĬaesars Palace may have opened its retail casino in the Las Vegas desert more than five decades ago, but the global brand has embraced mobile betting. Still, with the industry becoming more crowded and neighboring states snatching market share away from the Keystone State, operators are going to look to build loyalty with long-time players by offering boosted odds, reduced juice, bonus bets, and bonus same-game parlays for those who stick around. Veteran sports bettors who may have already signed up for one or more of these PA online sportsbooks can’t cash in on welcome bonuses.