Put too much emphasis on AdSense and your site may be linked to less

The more available space you dedicate to AdSense on your site, and the less you differentiate between ads and content in your design, the more money you earn with the program, right? Not quite. While pushing the AdSense may result in short-term gains, it might also convince some visitors that the site is too crowded to be worth visiting again. And some of those visitors may also be bloggers or other people who might otherwise help to promote your site with links to it. And the less your site gets linked to, the less traffic it gets, meaning AdSense revenues may go down in the long term.