What Disney has to do (probably) is figure out a way to CYA for people that come for a week to ten days, buy on a payment plan, and then cancel the CC the week after they get home. Same state enforcement of financial obligations is much easier (for CC's) than it is once you cross state lines.
Sure they can cancel your AP, but if you've already used it for a 10 day stay and never intended to come back again during the duration of your AP, they really get screwed if they've only collected the first month's payment of $50 or so. Never underestimate the number of people that would screw Disney over if they "never have to see them again." Thousands
(really hundreds of thousands if it were open to EVERYONE) would do it, despite the fact that we would like to believe differently. It would be a cluster on gate collections for Disney. Why wouldn't people do it? Look at how many lie about kids ages right now!
What they will likely do (IF they ever do anything) is find a compromise with a substantial "down-payment" much akin to the price of a MYW ticket for 5-7 days, maybe with the PH option but likely not since that rapidly approaches the price of an AP anyway.
Another bonus for FL residents is that they ARE more likely to want to keep their passes active, and they're in-state. This makes enforcement much easier for in-state residents.
One advantage we have going for "us" is that we don't actually have a discounted ticket as we often reference it. We actually have a seperate category of AP and what we refer to as its discount isn't really discounted, it IS our/
DVC's gate price. This makes us easy to seperate from "normal" AP holders. We're also more likely to keep our tickets in force since we are likely to come multiple times in a year since we own on-property. We're also a group that is likely to NOT buy APs if we only have enough points to come one week a year. There's also the possible enforcement of payment through DVC since we are ALL under contractural obligations to DVC already, at a MINIMUM, for our annual dues.
Bottom line? IMHO? We ARE likely to see an AP payment plan for DVC members. Probably sooner rather than later. My bet is that it's already well into the planning and maybe even the early preparation/implementation stages. There's really no reason they can't implement a system for US similar to FL residents since we really are sort of residents based on what I said above.
For the normal traveler that buys APs? Ain't gonna happen, IMO. Enforcement is just too hard, again, for the reasons outlined above, and for that reason, there's really no benefit to Disney to roll those dice.
We'll see, but that's what I think because that's what makes sense to me.