There are times when moneyline wagering is smarter than point-spread wagering and this is why moneylines are growing in popularity. Typically used in baseball and hockey, pro football moneylines are popular in Las Vegas for picking underdogs. The team you choose only has to win the game, not win by a certain number of runs or goals. The negative value still indicates the favorite (-150) and the positive value indicates the underdog (+130). It's easiest to picture the number 100 sitting in the middle of these two values. For example, if you want to pick a -150 favorite, you would risk $150 in order to win $100. On the underdog, you would risk $100 and win $130 if the underdog wins. It's a simple way to have the risk-reward scenario. In the right circumstance, where you have a small underdog, you can get a very similar bet by risking less and also get a bigger payout by going the moneyline route.
According to an article in The Times dated 10 April 2009, approximately 30,000 spread bet accounts were opened in the previous year, and that the largest study of gambling in the UK on behalf of the Gambling Commission found that serious problems developed in almost 15% of spread betters compared to 1% of other gambling. A report from Cass Business School found that only 1 in 5 gamblers ends up a winner. As noted in the report, this corresponds to the same ratio of successful gamblers in regular trading. Evidence from spread betting firms themselves actually put this closer to being 1 in 10 traders as being profitable, with a high number of clients suffering from the volatility that is supposed to be one of the benefits of spread betting.
There is no such thing as a half point in sports, but there is in sports betting! The half point ensures that a side will win and that the match will not end in a push, where the spread equals the actual difference in points between the two teams. In a push all bettors get their money back, which is no good for the oddsmaker! Half points also give oddsmakers more control over lines, allowing them to set more specific values.
Although the potential payouts look tempting - many sports bettors have dreamt of cashing in nearly $10,000 by nailing a $10, 10-teamer at 850/1 - they are a bad bet because they are difficult to hit and do not pay anywhere near true odds. This is how the sportsbooks make a lot of their money. For instance, let's say you want to bet a two-team parlay. For two games, there are four different possible combinations of outcomes, thus the true odds are 4/1. However, the sportsbook is only going to pay you 2.6/1 for your efforts, thus giving them a "juice" or vigorish in their favor. However, if you only have $20 to your name for a football bankroll and really like two games, the two-teamer might be the way to go because you could win $52 for your $20 wager.