The share of Brazilians who have placed bets on online sportsbooks since the start of the FIFA World Cup has reached 34.8% of the population, three times higher than the 11% recorded in May, according to a survey by fintech Klavi based on Open Finance data.The average amount deposited per user on Sunday (28) was R$272 ($52), compared with an average of R$188 ($36) in the days leading up to the tournament, a level that has remained elevated throughout the competition. The peak came on June 14, one day after Brazil's match against Morocco, when the average amount wagered per bettor reached R$524 ($100).

More than 60% of deposits are made after 6 p.m., the period when most matches are broadcast and also when problem gambling is most prevalent, according to clinical evidence. Rodrigo Machado, of Hospital das Clínicas, said that "it's when people are no longer under their spouse's supervision and have fewer restraints."

In Brazil, online betting companies face restrictions only on the format of advertising, unlike countries such as Australia, the United Kingdom, Portugal, the Netherlands and Belgium, which impose stricter rules. CazéTV, Globo and SBT are under investigation by the Justice Ministry over alleged abusive advertising practices. The broadcasters say they comply with Brazilian law. IBJR, which represents the companies under investigation, said Brazil's gambling laws are already strict.