Huh, the more you know.
I was at the polar opposite view that it was just the group of fans, and that we are all yellow fever as we are all the group, kind of a not for profit collective, as opposed to it being a company and we all use the service they provide.\
For example. if they asked Jim, who may frequent these forums, and may have had a YF ticket for 10 years, if they could use the Pun, he may have given them permission and all parties been none the wiser they were using a seperate companies brand.
(If there is an actual Jim fitting the above description, sorry it was a coincidence)