You missed it. They had a booth in one of the inside hangars. I just snickered as I went by.
The EAA doesn't give much of a hoot about scamsters. They allowed some scam "You won a free trip" operation to collect names under false pretenses there a few years ago. With the general decline in aviation and Airventure as a whole, the whole building will be populated with scamsters, frying pan salesman, and nutritional supplement dealers. It's going to be harder and harder to distinguish Airventure from the state fair.