There is a wide variety of sports you can bet on, and no matter what sports you are able to find there will always be a market for almost any type of gambling. As long as there is a demand for a specific market then there will be sites out there who will offer odds on that, you may need to do a bit of searching but you will find it.
Although football is the most widely popular sport to bet on, a lot of people willing to place bets would want the choice of a wide array of sports available for them to bet on whether it be Horse racing, Boxing or Rugby.
The more choice that is available to potential client can only be a good thing for potential new clients