[Fzznik]

Glancing at a tag cloud is a great way to figure out what someone's blog tends to write the most about (the biggest tags) and what they write the least about (the smallest tags). I've been known occasionally to arrive at someone's blog to read some article, glance at their tag cloud and see maybe some other interesting topics they've written about---especially if it's one of the bigger ones---which I do click on and sometimes discover more interesting content on their blog as a result.

So yes, I've clicked on them. But not very often. But certainly "look at" more than I actually "click on", so there is still some value in these to some degree even if people don't click on them.