I started writing on hubpages in search of some extra bucks. But I ended up as being rejected by Google Adsense (mainly because I belong to Asia, and will have to prove my authenticity).
I was a bit dishearted, didn't write for a week. But then I just started to spill my heart out, wrote whatever I wanted to, despite of the topic, keyword, SEO, or whatever.
And now I feel quite content with the things I have put up in hubpages, especially my social awareness hubs.
So I would say that MONEY IS IMPORTANT, But If you face problems in that, just don't give up. Write whatever you want, love WRITING, and one day you will DEFINITELY be earning $$$. That's my guarantee, best of luck :)