Clubs aren’t really interested in season ticket holders once they’ve got their money, so the money is in the casuals (glory boys in my day) why should it be cheap for them when their not prepared to commit, they don’t turn up very often so make them pay, same in most other situations flights, holidays, buy a ticket for a concert or pay on the door, like NI says win games you’ll get the bums on seats.
Your argument doesn’t really hold up there. Do you pay less with Ryanair just because you take a flight every week? No.
That might be a suitable model where demand outstrips supply but that’s not the case at GP is it? Every seat unsold is a lost opportunity; even if you sell it for £1 that’s £1 more than you would otherwise have got, there’s no variable cost involved in selling more seats.
