Which pays more, Ad Units or Link Units? With link units, when users click a topic, they're brought to a page of related ads, and with ad units when users click on a ad they're brought to a web site. I also noticed that AdSense publishers are permitted to click on link unit topics on their webpages.
From my experience, ad units work better. However, link units still bring a pretty decent CTR if they're placed correctly (ie. make them seem like they're part of the navigation).
Link units are to small to be noticed, the larger ad units appeal more, but if you place the link unit somewhere where it blends with navigation, or a string of links, you will get some decent clicks. BTW you can have 3 ads and one link unit, many people think you can only have 2 ad units if you have a link unit.
ad units perform better, but there are some situations when link units fits best. it all depends on your website layout.
To me the one that pays most does not matter, the one that is the most popular is important. Ad Units works the best. Search boxes are dead and link units not as popular as ad units. Even if search box pays 10 times better than ad unit it will not help you much if it receives 100 times less clicks.
Ad units work better than link units because the user has to click twice for you to earn from a link unit. Once to get to results and then click again -- if they see something they like -- before you earn anything.
AdUnit is much better, one click means money for you. I had a linkunit for 2 month, generated not even a few cents. Problem is that you only earn money if the user clicks on a link on the result site from a linkunit.
ads units, for me, but still not enough for a payout check yet. I have made some money of referrals as well.
I use column ad units, those work the best for me. But if I get a high traffic blog post, I'll put a little 468x15 link unit in there, and it gets a lot of attention, good little money makers sometimes.
I think its referring to the ads that arent just links, and not the referral types but the AdSense for content ads. Thats an ad unit.