Gosh I hope the hammer comes down hard on folks trying to make a buck this way if they even briefly creep over 1000 - since 1000+ events are banned maybe target events in the 100s range.
The clicker is effective for fire code issues (since you want to make sure X people aren't in the building) but for disease related issues you don't want those people gathering anywhere, and now 1000+ people will have been gathering (at various times of the night) just outside the venue because of the event.