In theory I like that too, but must admit that I almost never actually look at the revision history on a page to get any sense of whether there is some element of the page frequently edited back and forth or other signs of controversy. I also almost never look at the discussions associated with a page.

And to answer the OP somewhat directly, other than the New York Times crossword puzzle, there is not a single Web site I have supported financially simply for content.

A year of donating to NPR was the closest instance and since that act of support resulted in approximately 4 billion calls requesting charitable donations I stopped it and live a life of mooching while getting my dose of Ira Glass and Science Friday.

Wikipedia saved my butt when writing the ginormous paper I had to write. It had sources Google didn't come up with.

And there is now a thank you message from their founder.