Actually for large festivals and events where a turnstile count is impractical it’s not that an uncommon practice. I guess there is a driving need to be the “largest”. Personally I don’t care what metric is used whether it be planes, people, parked cars or porta potties. I would like to hear two sets of number (1) total weekly and daily passes issued and (2) a real estimate of the daily attendance. Hey, it’s Oshkosh and I’m still gonna attend regardless of what the numbers are.