I can't, for any conceivable reason, see why anyone would go to the trouble of ditching a cheap season pass for a new membership, even for skipping the line and all of that. I can see buying a membership after the pass expires, but the whole "we'll give you company script instead of cash" just sounds like so much trash, especially since they don't give you change back on Bunny Bucks (which I'm not exactly sure is even legal).
That said, something for the monthly-installment adverse members. You can link a membership to a PayPal account. So if you'd prefer to pay in one lump sum, fund the PayPal account with the amount you'd be paying for the whole year. You'll have to do a bit of math (especially if you're leaving the deposit on the passes), but that is one way to do it.