http://www.stevepavlina.com/blog/2006/05...your-blog/
Since you asked. IIRC, the record for a month is 84,000 US$ I consider that somewhat beyond the pocket change range.
There was one guy who sold Each Pixel on his web site for 10$ At the resolution he used , he became a millionaire. That is WAAAAY beyond pocket change. Even for Bill Gates.
A good blog will draw a million hits per month. That is 100 US$ per ad. Put 10 ads on the site and you have 1,000. All for a few hours work per week.
Not at first of course. It takes years to grow your audience to the point where you can just cruise along, making money 24/7.
It doesn't pay as well as hanging out in a cube farm, moving that paper, but it doesn't take as much time either. Plus you still have income when you are between cube farms. For us old retired geezers, It's not a bad gig. That is why I'm looking into it. I think I have figured out a hook, now I just need to work out the details.