Remember the Internet is a tapestry and the back links count to the search engine. Earning money on the web is about being an integral part of the tapestry. Be active here in different ways - writing hubs, asking and answering questions, interacting in the forums and then branch out to other websites - including creating your own.
To make 4 digits a month takes a tapestry of efforts.
Best of luck to you and your monetary endeavors.