Betting is the only way to make constant profits from sports betting. You don't even need to have interest in sports or betting to take advantage of an bet and make extra money online. It is a trading technique that uses the difference in the price (odds) to make instant profit. The principle is ‘sure betting‘, supposedly with minimum risk and long-term, guaranteed profits. The profits are tiny, so having a big betting bank is the only way to make it worthwhile.