Content locking is one of the easier ways to make money with CPA; but you still have to do it right to maximize your profits. Be sure the content you're locking (your "content offer") is actually valuable enough for people to want to complete CPA offers for.
As far as which network to start off with; CPAlead is good, but Adscend Media and Blam have way more offers. And they also allow you to direct-link to offers -- an option you'll eventually want if you decide to use your own content-locking script.
I have to buy each text I need at resources like essaypro It is fast and easy, and those guys are professionals indeed, but I want to write something by my own strength sometimes. Do you know that feeling? I would buy a course on writing. But if you are in the opposite situation, I would recommend those resources. It is really useful if you need some list of writing services.
Content locking provides excess security to your website content. In order to get your contents, visitors need to go through a surveying process. Basically, it aims to eliminate spams occurring on your site or mainly copyright violation.