(If you want to see that definition for yourself, do a Google search for The following is a supplement to Dave Smiths book, Disney A to Z and the PDF will show up.)
Daves definition says that VMK is sponsored by WDPRO. Look up sponsor in the dictionary and it is One that finances a project or an event carried out by another person or group. Wikipedia says Sponsorship belongs to the promotional tool of Marketing. Finally, one Universitys website defines sponsored projects as Programs which are supported primarily by an outside sponsor, conducted over a specified period of time.
Maybe it was never made explicit on the VMK website (although, do any promotions says "This is a promotion"?), but Dave knew that VMK was a sponsored project and I think his definition is consistent with the information that Disney has released as to their reason for closing the game.