I write for the fun of it. The money is just a bonus. Though when I got approved for Adsense I did get quite excited about it, especially as I seemed to do well. I hit my pay-out limit in less than a month then I get an e-mail the very next day saying I've been booted out. I appealed but no response up to now.
Oh well, thankfully that wasn't the be all and end all of why I write here. I just move on and continue to enjoy the opportunity to write stuff that interests me and sharing my thoughts and opinions.