Take jj vs rn fight. If we make a survey on sherdog with the question who will win, the results will most likely reflect that 4:1 probability. Now whether you want to convince yourself and others that Rose is a submission threat JJ has never seen or that jj is just gonna beat her up is a matter of taste and fandom, but the fact of the matter is the price is right, so either bet just pays the juice.
Some of you guys are long term winners, so you must be finding good bets mostly in the lower tier fights or maybe guessing the line movements, but for me, I mostly have time to research main cards, which offer correct lines. This is why I think Bisping is a good play.