Soflyy

<h4>Market your content virally on social networks by forcing users to perform a social action before accessing your protected content.</h4>
Check out the 2 minute demo video on YouTube: http://www.youtube.com/watch?v=aheR3_ROt94
Like To Keep Reading is a WordPress plugin that forces visitors to Like you on Facebook to access content on your website.
You can protect entire pages or posts, or just sections of pages or posts (our favorite) – i.e. your visitors can read the first two paragraphs and then must click the Like button to keep reading.
You can force visitors to Like your website homepage, any sub-page/URL on your website, or your Facebook page.
Like To Keep Reading also has optional Google+ and Twitter integration – so instead of Facebook Likes you can get Google +1s and Tweets from your visitors in exchange for access to your content.

Like To Keep Reading

Get more Facebook Likes, Google +1s, and Tweets by forcing users to perform a social action before accessing the rest of your content.

fergbrain

Forces new users to register additional fields. Available fields are:
<ul>
<li>First Name</li>
<li>Last Name</li>
<li>Nickname</li>
<li>AIM screen name</li>
<li>Yahoo IM screen name</li>
<li>Jabber/Google Talk user name</li>
</ul>

Force User Field Registration

Forces new users to register additional fields (such as first name and last name). Note: WordPress 2.5 or higher is definite required due to new erro …

Like To Keep Reading vs Force User Field Registration