Yet I look at the charts for last year and boxing is top, and a UFC fight with a guy that made his name in the WWE is second, followed by Wrestlmania.
UFC has more PPV shows a year (Last year I believe there was two PPVs in the space of a week) so would obviously come out on top overall.
I don't know where to get BSkyBs buy rates, but they are still offering WWE events PPV in the UK (and making more of the events PPV) so I guess people are buying them.