I would say that is their problem, not yours. Call those fuckers and tell them to use a real file format, or you and all your friends are going to boycott them. Of course it's just a trick, but they might fall for it.
In all seriousness, though, I would rather be media deprived than a media-type slave. No Real or WMV on my Mac. If I am interested enough in the material, I will complain loudly to the owner.