I have argued this on a thread before and not quite long, but maybe I am wrong. If you are not betting on sport like football, do not bother to choose either yes or no.
Since I have been betting, I have not thought of this before. Is the referee the reason you bet on yellow or red cards?
I love sports betting, especially soccer. On soccer, I bet on win/loss, corners, goals, and/or cards. But I have placed bets only on yellow cards. I have never placed bet on a red card as far as I can remember. And when I place bet on white card in maximum time I became winer and it make me a good profit.
While place bet on sports betting especially football I don't think of placing bet on cards as I think cards are more difficult technical to win than just normal win, over, under, home or away, home win or draw and away win or draw. Also like how many goals in first half and how many goals in second half, both half total goals. These options makes it more easier than having to bet on either yellow or red card.