That's not what the OP said. Linkedin presents a form on the front page after you're logged in that specifically asks you to enter your password so that you ca

That's not what the OP said. Linkedin presents a form on the front page after you're logged in that specifically asks you to enter your password so that you can search your e-mail contacts. But many people might interpret that as a LinkedIn log-in form (not realizing that they are already logged in). If LinkedIn just had an ad there asking people to click a button to then fill out their e-mail address/password, they would likely have much fewer people let LinkedIn look at their e-mail account. This is much more legit than just trying the Linkedin account username/password to access the e-mail account, but it is still a form of phishing.