None of the tracks we ran this year had one at pit gate, couldn’t say about front gate as I never go through one. Concession stands should have them though I believe.
Race tracks need to be cash ,they rely on that to make payoff,for racers, most racers at least lower classes, might spend there last dollars to get to race track, and rely on cash to get home, so paying payoff by check won't help them, can see it at concession stand but not really anywhere else
Several tracks in the Kansas City area take plastic at the front gates. (don't know about the back gates) It seems to actually take longer than cash. Most of the tracks seem to run the credit cards off of a phone line and they are painfully slow. I know that some of the tracks have credit card only lines.
