Pay for blogging?

I have heard so many of you out there saying how easy you earn while you do the thing you love....blogging. I wasn't so interested at first but I did try out PayPerPost (3P) and got rejected. That was when I just started blogging. I didn't really believe in earning much but when I saw what my sis was earning thru http://www.blogitive.com/ , it really gets my blood boiling. I want this passive income too. But how? It was so easy registering with them. I just fill in a few lines of information and most importantly, my URL. How I waiting for them to approve and then I can have my first passive income rolling in. *finger cross*