10 cent Super - 3 questions

First, why doesn't every track offer this wager. I see beginners and novices beginning to fall in love with the sport because of the fun they are having with this wager. Why wouldn't the track want to gobble up every possible $ they can into their total handle?

Second, I still see very good handicappers hitting Supers for a $1 complain when they go over $600 tax limit. The tracks have made a great tax loophole by offering these 10 cent wagers... bet 10 dime supers instead of a $1?

Finally, I still am not completely familliar with all the tracks that offer these wagers. Let me know harness tracks also, considering a lot of them swith to t-breds during the season.