Such things can happen very occasionally. It's really just a simple form of a chance break. There are still quite a lot of people who bet small amounts in the hope that a lot of money will be won. Especially with bets of 1 EUR, for example, and then with odds of 1000. In theory, that could still work if you take a multi bet with matches that are all around 2.0. You see it in the news sometimes. I thought that someone at Duelbits once won a very large amount in a casino, but that can't be linked to betting on sports of course.