NO part of your dues should go to anything except upkeep of the property you own. That is Florida law. Things such as advertising, the sales office, and the perks (which are a sales incentive) are either negotiated between the various departments (i.e. budget transfers) or paid for out of the DVC profits (which come from sales)
Paragraph three of the Receipt for Member Benefits Guide which everyone got and everyone signed says, in part
"No cost(s) of operation, maintenance or repair of any properties or services available as part of or in conjunction with these special programs is passed on to a Purchaser as part of the Purchaser's assessment for common expenses of the condominium"
I do not agree with your interpretation.
The Member Benefits Guide is comprised of the following sections:
1. Disney Vacation Club Golf Program ($50 annual membership program)
2. Disney Vacation Club World of Attractions Program (minor discounts at waterparks and DisneyQuest)
3. Special Program Option (things like recreation discounts, boating, child care centers)
4. Disney Collection Program (ability to use points at non-DVC resorts)
5. Disney Vacation Club Travel Program (Adventures by Disney and Concierge Collection)
6. PreOpening Program (gives DVC the ability to take reservations for units which are not yet in the condo association.)
Valet parking is not addressed in any of those categories.
Although valet parking was frequently referred to as a "perk", it falls under the heading of a resort service. It's no different than Disney theme park transportation (buses, boats, monorails), bell services, Community Hall, the concierge desk to assist with tickets & dining reservations, Disney's Magical Express, Internet service, housekeeping...all of which are covered by member dues.
Even though valet parking is operated by an independent company, that fact doesn't impact this situation. DVC doesn't employ most of the CMs who work at the resorts. They contract out with Parks & Resorts for housekeeping services, front desk staff, bus transportation, and so on. They contract with Mears for DME. It would have been well within DVC's rights to contract with the current valet parking provider in order to continue offering that service to members staying at the respective resorts.
I agree that DVC could have been a little more forthcoming on this matter. However, if the decision was forced by changes in the contract with the valet parking supplier (which I believe to be true), it's not terribly surprising that Disney would want to limit what they disclose. They aren't going to be reckless in revealing details of vendor negotiations--even to DVC members.
This is no different than how other major corporations act. McDonald's (just to pick a company) isn't going to comment publicly on why they decided to buy computers from Dell vs. HP, Apple, Sony or Toshiba. Not even to shareholders. That is considered privileged information.
DVC isn't much different since we signed-away our decision-making rights at the time of our purchase. As a large publicly-traded corporation, Disney is very particular about revealing details regarding its vendor relationships. Even if this comes up during the condo meetings, I suspect we will get a politely-worded "no comment."