Michael Rubin said heavier marketing is intended to narrow the sportsbook gap with DraftKings and FanDuel as prediction markets reshape competition.
Combined betting activity grew as iGaming revenue rose and land-based casino takings declined.
The reported 8% increase came as iGaming remained the market’s main source of gross receipts and sports betting trailed July.
The inquiry starts with allegations over promotional targeting, while regulators weigh AI’s potential role in detecting gambling harm.
Thirty-eight people under 21 opened accounts and eight placed bets before Underdog identified and self-reported the verification failure.
Handle rose from July and from a year earlier, while monthly revenue fell to a two-year low and the sportsbook hold declined.
U.S. News respondents also reported borrowing to bet and substantial use of prediction-market platforms.
Online casino adjusted revenue rose from a year earlier, while sportsbook receipts fell 29.3% and total online gross receipts declined from July.
A 13% rise in wagers delivered only about $17 million in revenue as opening Sunday results favoured bettors.
Florida attorney Jennifer Hoekstra says notifications, bonuses and VIP programmes are designed to keep vulnerable bettors wagering.
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