More than half a billion dollars were bet on sports in Massachusetts during the month of March.

Data from the Massachusetts Gaming Commission, reported by the Boston Herald, show that $548 million in bets were placed, delivering over $9 million in taxes to the state.

These numbers only represent a partial month of sports betting in the Bay State since the launch of sports betting on May 10.

"It is a little difficult to read into these first-month numbers, because we know there is a lot of promotions baked into them," said Eric Ramsey, lead writer for LegalSportsReport.com. "The big operators, DraftKings and FanDuel, have been giving a ton of promotional credits."

"Massachusetts is and will be a sports betting hotbed," said Bill Speros, senior betting analyst at Bookies.com. "It was astonishing and eye-popping, also not unexpected."

In terms of where the bets were made, $548 million were bet on the authorized mobile platforms while $20 million were bet in the sports rooms at casinos in the state, according to the Herald.

Draftkings was the most used application in the state, followed by Fanduel and BetMGM, the report says.

The numbers by the Massachusetts Gaming Commission come the same day the major sports leagues and NBCUniversal were among groups launching the Coalition for Responsible Sports Betting Advertising.

According to a news release from the NFL, the group is "committed to doing their part to help ensure a responsible approach to sports betting advertising."

"I think the coalition is great news. There are a lot of eyes on sports betting right now," said Chelsea Turner, with the Massachusetts Council on Gaming and Health. "It would be great to see a little bit more of a counterbalance for the advertising for sports betting and the responsible and safe play messaging."