I have raced at more tracks than I can even remember over the years, and I have never once had to pay any kind of rental fee for a transponder. I may race 2 or three times a month, and only during the seasons I can't drag race (my other hobby), so I don't feel the need to go spend even more $$$ on something that should be provided as part of the fees, especially since not everyone is the cause of the problem.