I've seen here and there various people comment on the perceived prevalence of outside sponsors at Disneyland, from attractions to the little hand-washing instruction placards above the sinks in the restrooms, almost always in a derogatory sense. Some seem to think it is a new phenomenon, but I'd like to point out the track record at Disneyland. There was a time when almost every other word on the PeopleMover spiel was "Goodyear" or "rubber," same with the Monorail spiel. Look at the Monsanto House of the Future or the Monsanto Hall of Aluminum or the Adventures Through Inner Space, presented by Monsanto, or Walt Disney's Enchanted Tiki Room presented by Dole. How about Richfield Oil's "The World Beneath Us" film, a blatant advertisement for the raping of the earth for fossil fuels.
If Anything, the advertising at Disneyland these days is more subtle and doesn't hit you over the head the way it did in the past. Only the Tiki Room remains as an example of in-your-face blatant advertising at Disneyland, and even then the Dole presentation fits perfectly with the theme of the attraction (minus the stupid modern Flash-based animation). Even a complete billboard at the park (toilet paper advertisement near California Screamin' at DCA) fits into the theme, looking like a hand-painted advertisement from the mid-'30s. Sponsorship and advertising at the parks is neither new nor is it detrimental as advertising dollars are some of the reasons that Disneyland has maintained a (mostly) consistent level of quality and enjoyment over the years. Think before the next time you react negatively to an ad in the park.