100% agree. It can be just a small little extra income, but don't make it your primary source of traffic and sales.
You shouldn't make any ONE site your main source of traffic. Most of you rely completely upon Ezine Articles, which is a mistake. It's pretty much the same, I know of people doing ONLY Craigslist and making a killing with it, but you have to go back every day and relist your expired posts, so you can pretty much forget about the hands off passive sales if you do CL or any other type of classifieds... UNLESS you do eBay classifieds which relist themselves. Fuck shouldn't have told you about those...