Basically, a PSL is a "license" to buy season tickets. Beofre you buy the tickets, you pay a fee to be allowed to buy.
Con job if there ever was one.
Anymore it's mostly the corporate crowd who attends, and they just allocate costs of the circus to their customers as entertainment XP, bundle it and pass it duly along.
Of course there are always the common fools- the unthinking fanatics with more disposable income than sense. I'm pretty sure P.T. Barnum would be proud.