Yikes. What a terrible idea to place your brand's reputation in the hands of people that don't hesitate to make assumptions about your customers' intelligence. Adobe allows certain users to speak as "Pros" on their help boards based on their past helpfulness, which has gotten out of hand before, but they certainly make the distinction between staff and user in the nameplate so people know not to associate them with the company itself.

Is the point of volunteering to put it on your résumé for future employment opportunities in customer service?

It's pretty much how the Apple support forums work.

Official employees have "Dropboxer" or something similar as their title.

That doesn't matter in the slightest.

This is the company's OFFICIAL forum, and therefore the conduct of the appointed "moderators" reflects that of the company.

In the absence of any other information, any reasonable person would assume that the "Moderators" are Dropbox employees.

Not if said person isn't actually employed by the company.

IOW, they work for Dropbox, they just don't get paid for it.

That's why they are volunteers.

Wait, what? Volunteering in general or even open source or community software projects makes plenty of sense, but why the hell would anyone volunteer for a private for-profit like Dropbox?

Is it some kind of internship scam?

Some customers really like the product and don't mind helping out other users on forums for free. Happens all over the place on forums of all types.

That didn't work out so perfectly for AOL.

http://en.wikipedia.org/wiki/AOL_Community_Leader_Program

For all intents and purposes, they represent Dropbox. It is poor choice of Dropbox to let themselves be represented by unqualified, unvetted people and then distance themselves from it "because they are not getting paid". They work for Dropbox, they just do it for free.