Personally I think Disney has shot itself in the foot. With the recent promotions such as YOAMD and WWYC consecutively in the last 3 years, they've spoiled us. I'm 19, and I too remember when the promotions were simply anniversaries of the parks. Then they became the anniversary of Mickey,
Disneyland, etc. After this the promotions giving away free things started, and that's where the problems start occuring IMO.
This concept of looking for something to celebrate makes a promotion like the volunteering one look like a huge step down in terms of return for the guests. Why would the average person want to work for a day when they could have just gotten the same thing for free on their birthday last year? I'm aware of the concept of volunteering, but I don't think the majority of the population would be happy just to give their time with little reward. There's a reason Disney felt the need to "bribe" people to volunteer, most people don't want to do it.
Now, that said I do think it's great that Disney is attempting to get people involved. It's a great PR move, and it makes Disney look like a caring company. However, I don't think they're going to see as much of a reaction to this as YOAMD or WWYC. I used to look forward to being lucky enough to go the parks the years of the anniversaries. To whoever said they don't owe us a promotion, you're right and I agree, but they've lead the public to believe each year there will be a promotion with something free.