Today, I wanted to research some cookware specifics for compare-and-contrast. The one hit I got that had real, useful reviews of finishes, etc. automatically rerouted to a sales site. I kept hitting the back button and reading the info three words at a time, which was how long before it flashed back to trying to sell you "titanium cookware". I eventually managed to add enough parameters to get one or two hits on consumer reviews in the pages of attempted sales. There were some that looked promising on the link page, but just took you to a "buy this" page.
It's happening. There is too much junk on the internet. (Of course, it doesn't help that the sales sites pay to get themselves into top slots, with the search companies.) The niche for data-miners is broadening.