Disney certainly makes a healthy profit from DVC, but I'm not sure I'd agree that it's disproportional, it certainly wasn't my intention to imply that it is. IMHO it's more of a cash flow difference for the company involved. Disney could certainly make more money in the long run by sticking with hotels, but it runs the risk of losing business to other timeshare companies.
DVC offers value to Disney in that
1) Disney gets its money up front for the development aiding to it's cashflow enormously.
2) Disney has a guaranteed customer base who will return year after year spending money at Disney restaurants, shops and parks.
DVC is a slightly more expensive offering than many other timeshares, BUT it does also offer a better product for those that want to stay on site. All companies need to return a decent amount on their assets, land on Disney property has an intrinsic value and as such Disney would be fully justified, IMHO for valueing that land use at a higher $ amount than say Mariotte if they were building 5 miles away from Disney property.
I think it's slightly disingenuous to adopt the view of what a company is making out of a product, IMHO it's irrelevant what a companies profit margin is on a product, if that product shows value to you as a customer , you buy it. If it doesn't you don't. Perhaps a fair comparison would be oil prices. Would you turn round and say, I'm not going to use petrol made from Saudi oil because it only costs them $2 per barrel to dig out the ground while it sells for the same price as north sea oil which costs $8 to produce (both figures made up for the sake of argument).
Companies are in business to make money, their pricing is decided by what they think the market will bear as a cost. DVC shows the punters a good return (from their point of view) because Disney has to price it at a level where the reason to take up the offer is reasonable clear. America is a very capitalist society, their companies are expected to return decent profits, if they don't their shareholders would be calling for the CEOs head on a plate. Disney property is very highly valued real estate, while it may appear the profits seem high to a layman, I would think they are in line with what most companies would expect, as I previously said the "beauty" of DVC for Disney is that the cashflow advantages it shows the company. Building a hotel is a high upfront cost, but the returns take up to 20 years to fully recoup, with DVC the profits are shown almost immediately. It's that rapid return on investment that makes it so valuable to the company.