Care to substantiate that? For instance, IMDB's facts are it's business, which is why some of those facts are reserved for paying members. Likewise, the fact Amazon has free public reviews is a big reason that people visit Amazon, just as the subjective blog posts of 37 Signals contribute significantly to their success.

True, but IMDB was acquired mostly to provide data to Amazon.com. For 15K, you can get access 'legally' to IMDB data.

As for IMDB Pro, serves mostly the film/tv industry itself not consumers, where the money is.