That the NBA regular season outstrips the NFL is to be expected given there were only two weekends of NFL regular season games in the quarter. Also note that close to half of betters said they had gambled on the annual"March Madness" tournament.
The most recent month with full data available from state gaming officials reporting on wager amounts is January 2022. That showed a staggering $8.2 billion was wagered online for sports that month, led by gambling newcomer New York. The second is that money earned is often reinvested as additional bets. Say an individual bets $50 on a parlay and nets $250 in winnings. As it stands, that’s $50 wagered. If they then stake $200 from the new total, that equates to $250 wagered.