The site I mentioned is a combination of beauty/health advice articles and beauty product reviews. We don't sell products, but do link to some ecommerce sites. However, not for every product. There is a lot of UGC (product reviews and article comments from our thousands of registered users). That is all moderated well.
Our product pages make up over 40% of our overall page count. Those pages have the highest bounce rate (70%) and the lowest PPV (1-2 pages) on our site. We're continuing to iterate on how to direct users from those pages to the more engaging article content (25% bounce rate, 8+ PPV).
We don't want to kill too many of the product pages, becuase they are of value to our users. We've thought about putting them on a subdomain, but didn't want to make such a big change yet. We may have to try that if we don't recover from this latest hit.