Your circle are the ones that give you $ and your friends are the ones that put out
Ok, so, it's kinda like this...<br />
There are Fans, and Friends... In your circle, are all the people you have added - that makes you their "Fan". If they then add you to their circle (becoming also your fan), then you both become eachother's friends.<br />
Hope that helps. If it's unclear, just let me know.
Actually I didn't enjoy it, that's why I moved on to other things too long of wait for feedbacks.
I enjoy the questions and answers better.