I agree, there is no threshold. Their pricing strategy doesn't make sense to me... granted I'm not the CEO of a Fortune 500 company and never expect to be...but it's all one pot of money for us. If I spend more on tickets, I'll spend less on eating and gifts. If there's a 5% increase in tickets, I'm not increasing my Disney budget by 5%.
Wouldn't they make more money selling "cheaper" tickets to get people in the door and buying/eating there? I can understand if their strategy is to make 1day tickets ridiculous so that people will stay longer, but they are not....

I would invest $1500 for 10m just to save $60....planning to in fact. That's 4%, I'm lucky to get 1% in my savings. And if I don't need that money, why not? Yeah, i could put it into stocks or mutual fund, but then I'd have to try to time the buying/selling, taxes, commissions, fees,etc. For a short term, that's probably not going to beat 4%.