Older style fruit machines would work purely on the basis of probability in terms of how much money they would pay out. Modern machines are usually set to pay out a certain percentage of any money that is put into them (usually between 75% and 80%).

Does Betfair Close Winning Accounts? No, accounts will not be closed or suspended for winning.

The short answer is that the potential earnings from Betfair trading are unlimited. As with any business or investment, the amount you can make depends on a variety of factors, including your skill level, the amount of time and effort you put in, and the amount of capital you have to invest.