Does anyone click on Link Units? I don't find myself clicking them, and even if I do, I click the back button when I see that the link unit takes me to a page of ads.
For me, I don't use link units because it need many step to get money (click link first and then click ads) and if your new visitor click on link units you may loss important traffic in the future because they may not come back again!
they are great for me and it works well with my sites structure. People clicks on the 'not so obvious' adsense link unit. -hope that helps
Link units are the second best effective ad unit in my site. I place them like a new menu at the left...
For adsense publishers as website visitors, no one will click the link unit.. However, to a normal visitor directed from search engine, a well blended link unit is what they are looking for (some even not know that they are clicking on the ads).
when using Revenue Monitor I found that the link units though effective because the text often matched the content, they often were low paying so I began to phase them out