Sadly, post Covid, I think this will appply more and more to other things than football.. Visitor attractions - wildlife parks, zoos, stately homes, preserved railways, for example - may well find it more convenient to know exactly how many visitors they'll get on a particular day, all paid for in advance, and so how many staff they'll need, how much of the attraction will have to be operating and at what level. Welcome to the new normal!
So what you're saying is they might find they can run their businesses more efficiently rather than preparing for the worst every time? For example, to borrow your preserved railway link, if a railway knows that they'll only get 150 people travel with them on a particular day then they can steam a smaller engine (with much lower demands on coal and water) and run fewer carriages, thus saving money on fuel, wear and tear and maintenance over having to run a bigger engine with a longer train. Seems like a cracking idea to me.