I found this website http://be-a-magpie.com/start through a Tweet on Twitter from @besttechie and his Blog besttechie.net. I had to go check it out. Basically the site tells you how much you can make in a Month through their service by allowing your account be used as advertising.
I WOULD NEVER DO THIS! So no worries to my followers. I did however find that an interesting concept. Plus you can go to the site type in your Twitter name to see how much you would make a month. Which I thought was neat.
Here were my results:
You can go to the site and Try it yourself: http://be-a-magpie.com/start