If that's the case, then I could envision a thrifty Brazilian Tour Group getting a single rental, pulling up to one of the Values and then all 40 or so of them piling out of it like one of those clown cars at the circus (while chanting and clapping, of course).
As I've thought about the fees more, I've come to a few conclusions (caution - ShadeDK logic ahead):
1) Parking fees affect three groups with cars: (i) guests who fly to Orlando ("FTO guests") and rent a car there; (ii) local residents; and (iii) guests who drive to Orlando ("DTO guests").
2) Fees - including parking fees - typically either charge for use of a limited resource/service, or try to influence choice. I think most of us agree that parking overall is not a limited resource at Disney. So what choice is Disney trying to influence?
3) If you're a FTO guest, they prefer you not rent a car because it keeps you in the Disney bubble. Disney even makes it easier with DME at no charge. But what about the UK guests who are exempt? Well - as a PP noted - those guests usually have long stays and spend cash. Fees are fees until there's an incentive to drop them for greater benefit.
4) Same thing for locals (or, really, any one in Orlando with a car - including offsite guests) who are day visitors to shop, dine or pay for other Disney resort activities. No fee for them - because that would be a disincentive to come by for a few hours and spend money.
5) Which leaves our last group - the DTO group. They may be too close to fly. They have no DME-like option. Many of them may be driving because it's cheaper. Odds are that if they're close enough to drive that Disney is a place they've been before - maybe every year, maybe multiple times a year. They're stuck with the fees - which aren't for resource scarcity, but to influence choice. But what choice? Fly in when it doesn't make sense? Spend more to travel to Orlando and enter the bubble? I really don't know - but one possibility is the one that keeps coming up: that Disney does not value the DTO guests (who they may see as less likely to indulge in extravagant spending on a once-in-a-lifetime Disney vacation) - so that the "choice" is: don't come here and stay at our place so often unless you're ready to spend more. Hardly feels like "home", does it?
But enough of that - I've probably given it more thought than the Disney execs who dreamed up this fiasco (and for all I know were the former management team at Prestige Worldwide and pitched the parking fees as a once in a lifetime business opportunity for Disney).