EditorialGuy - 3:04 pm on Aug 31, 2013 (gmt 0)
They're saying you should disclose TO GOOGLE that it's a paid link. That doesn't benefit visitors at all.
On the contrary: The use of "nofollow" on paid links helps to discourage manipulation of search rankings by site owners who have money to spend on SEO. That, in turn, helps to ensure a better search experience for users.