I really like what you've done.
The submission charts section of the site was particularly useful to me. You find that some fighters are skilled at one specific submission and that sometimes their opponents are highly vulnerable to that particular submission.
A big issue I found when trying to market the site was that, the majority of bettors have no interest in looking at data, reviewing fights, or putting any time towards making informed bets. Most people prefer to place bets naively primarily for the sake of entertainment.
Presumably there is a very small, niche population that would find this information very valuable. Funnily enough, those that do find it valuable are unlikely to share it - if they're acting in their own self interest they don't want other sophisticated bettors to enter the market and inadvertently help the bookies set the line more accurately.
Let me know if you'd ever like to connect. It would be cool to expand my network of people in this area.