When I raised that point, I was more meaning people that are not Aberdeen supporters. In the same way that you see people walking around in shirts from different countries here, this can happen the other way around (though probably on a smaller scale). A more recognised sponsor may lead to the shirt being more easily recognised and thus more demanded (if the product itself is of a suitable style/standard). It's nothing to do with kudos, more about the recognition factor that can come from being associated with a high profile brand.
The Man U example is clearly a world apart from us. They will sell millions of shirts regardless of the sponsor or style, because they are Manchester United - though I do expect more fakes are sold than genuine tops, but that's a totally seperate issue.