If you want get into the online gambling industry with sportsbetting one of the easiest ways to get your foot in the door is with niche markets. These areas are less competitive than the generic sportsbetting sites.
A few ideas include NFL betting, march madness or NCAA basketball, even golf. If there is a sport you can bet on, you can create a site that can target people that are looking to bet on that sport.
http://gaffg.com/blog/niche-markets-in-sportsbetting/
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