Hi guys … I just found this plugin and I think its pretty cool … mainly because its free
Easy WordPress Content Locker
Plugins that integrates seamlessly code from various Content Locker provider
Easy WordPress Content Locker allows easy implemention of content lock gateway widget code to monetize your content. It works with code from *******, Leadbolt, BlamAds, Adscendmedia, Adgatemedia, MGCash, Dollarade and many other CPA Networks.
You have various settings to match your needs and a user friendly interface.
Show in specific page: category, tag, archive, author, single post, pages and more.
Also You can select multiple options at the same time.
You can lock content for specific posts/pages, just enter the IDs of the posts/pages you want to lock into the according fields