It is tempting to file this under 'turkeys not voting for Christmas', but I thought it was worth reading at least, before I dismissed it.
Having read it, to be honest I have even less respect. Rather than consult with genuine experts, UCU have surveyed professors seemingly at random over the web. They tell us how many responded, but not the response rates, or any data about how representative of professors their sample is, so even as a survey of professorial opinion, it seems pretty weak tea. Why professors have more valuable opinions than any other UCU members, I can't see they tell us. There's no genuine new information about the providers themselves here.
Sometimes you can judge a book by the cover.