They start high and then get cheaper. You are basically paying to reserve the seat. The price will fall until it hits someone's price range.

It you wanted to wait until the game starts you can buy significantly cheaper tickets. But if you want a certain designated seat and to get there early then you have to pay for that.

Not saying it's a good way to do it. But this does give the person that's willing to pay more the rights to the seat vs something like a first come first serve system. In those, the scalpers buy them up and resale. Harder to scalp the overpriced tickets because the scalpers have to continuously follow the price and gamble, not just buy them for their "lowest price" at a certain time.