Sports betting can now be even more lucrative than before, thanks largely to the internet. Why is sports betting online any more profitable than sports betting with a bookie, or betting on sports using Vegas sportsbooks? The answer is simple: you now have access to a far greater number of sports books, and you have the speed necessary to make multiple bets.
Sports books are trying to get your business. In order to do this they have to discount prices on certain items, just like any other business that is competing to sell you something. They will alter their prices to be more competitive in baseball, and in exchange they might offer slightly higher odds on NFL games. This is quite a simplistic example. In reality they will shift the lines within a sport for certain games, but you get the point: the odds on a team winning will differ from sports book to sports book.
That is the key advantage to sports betting online. If you have the time and patience you can now try out sports betting arbitrage. This is where you bet both teams (or both outcomes) in a game with two different sports books, and regardless of which team wins you show a small profit. This is a favorite strategy of wall street investors, and it is exactly how you can make money on sports betting as well.
If you do not have the patience and time to search dozens of sports books for the best lines, you can still find value odds that will beat anything that Vegas or your local bookie can offer you. That is the beauty of the internet, and it holds true for sports betting as well.