Hello, I read some articles saying "Place your most clicked ads first in the html code. Because most payings ads will be shown in the first placed ad in the html code". My most clicked ad is 336x280, it is placed just after the article title. It is the first ad in the html code. Now I want to insert Link Units to my website. One Link Unit will be before my most clicked 336x280 ad. Will that LinkUnit affect my 336x280 ad's income by winning the competition? Do Link Units fall in competition with Ad Units? I don't know why but Link Units are paying so less according to Ad Units. For this reason, I don't want my 336x280 ad's income to decrease since I will place that Link Unit before it.