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We haven't totally solved this problem yet.  We removed the CSS that was hiding the links but otherwise left everything the same.  Only a few of the pages shows up in the first 50 Google results for its targeted keyword and none of the pages receives very much traffic. We are still considering whether it would be better to kill the pages and 301 redirect to something more relevant, or simply noindex the pages and leave them alone. Our biggest concern is that many of these pages have a lot of links coming to them, although most of them are very low quality links.  I think are best approach is going to be trying to improve the pages that do have some rankings and eliminating the rest of the pages with 301 redirect.