I'm not sure working in a poorly-ventilated football concourse, where you are going to have a lot of people who can't be arsed to wear a mask, talking loudly in your direction is a particularly attractive proposition right now.
….possibly, although the typical matchday employee is also part of the clubbing, house-sharing, partying cohort that form a large % of the current infection-spreading population, so I doubt they are all that bothered.
I reckon it’s mostly down to the lack of available Uni students until the new term starts.