BOSTON (Reuters) -Massachusetts securities regulators on Wednesday accused the popular online brokerage Robinhood of engaging in aggressive tactics to attract inexperienced investors and failing to prevent outages on its trading platform. Massachusetts Secretary of the Commonwealth William Galvin, the state’s top securities regulator, in an administrative complaint alleged that Robinhood marketed itself to investors without regard for the best interest of its customers. Galvin said Robinhood has a duty to protect its customers and their money. Yet, the complaint said, Robinhood gave its inexperienced customers the ability to make an unlimited number of trades without first screening them. The complaint alleged that Robinhood used the promise of free stock trades to attract new users and strategies such as “gamification” to encourage and entice repeated use of its trading application. “Treating this like a game and luring young and inexperienced customers to make more and more trades is not only unethical, but also falls far short of the standards we require in Massachusetts,” Galvin said in a statement. The regulator is seeking an administrative fine and an order requiring Robinhood to engage an independent compliance consultant to review its platform and policies. Robinhood in a statement said it disagreed with the allegations and will defend itself. It said it has “made significant improvements to our options offering, adding safeguards and enhanced educational materials.” “Millions of people have made their first investments through Robinhood, and we remain continuously focused on serving them,” the company said. The Menlo Park, California-based company has amassed 13 million user accounts since its founding in 2013, with its commission-free trading model gaining popularity among retail traders during the COVID-19 pandemic. Its valuation has surged to $11.2 billion. But the company has suffered several outages, and critics have argued its growth has been supported by drawing young, inexperienced traders to risky trading.