Are your visitors clicking on Technorati tags instead?
While I love Technorati and do some tag surfing on a regular basis, I am also intrigued why so many blogs are using related tags at the end of each blog entry. I suppose it helps them get more traffic via Technorati or maybe they wanted their readers to check out Technorati for other blogs discussing the same related topic.
I think a couple of words might help but if you already ping Technorati after every post, I believe there is not much signifant benefits in adding those Technorati related tags.
However, it is possible that your visitors will be clicking on them at the end of reading your blog and you end up sending away traffic and not able to monetize them.
My personal view on this is to leave no other clickable items at the end of your blog but AdSense. You may add the related topics plugin but that’s just more traffic for your blog as well. If you can’t get them to click on this entry, maybe you could on another one.
Come to think of it, how many percent of additional traffic do you get with those tags? If you want to know more about what links your visitors are clicking when leaving your blog, try LinkLog by BlogFlux.