Not sure why people want to complain about the rules. Look at it this way
As a person that has brought games to shows for many years. This is a rule that is familiar and the seller should tell a potential buyer that the game has to stay on the floor till a specified time. I know i ALWAYS have told buyers this and that if that doesn’t work for them then they shouldn’t buy it. Happens a lot for people that traveled far or are only at the shore like a Saturday
A buyer might not be the one agreeing to the terms but it’s almost like a car title. And the show has to sign off to release it