I recently discovered an interesting CPC network, Sharexy.com. You can add the most important social networking buttons to your website, like Facebook, Twitter, Myspace, Google+1, Linkedin, Pinterest, Digg, Delicious and a few more other buttons, they are more than 20 - you can choose what of they you want and what you don't want, of course - and this buttons will show ads for the visitors who click them, or when the visitors hover their mouse over these buttons. And when visitor click this ad, you will earn some money - just like in other CPC networks like Google Adsense, Chitika or others. It is really interesting, you can choose from many button layouts, you can add the buttons horizontally or vertically, or you can add a left/right layer with these buttons, it's your choice how you will add them. Also you can choose when the ads will show for the visitor: all time, or when the visitor hover his mouse over the button, or when the visitor is share your site for his favorite social network. They are paying twice/month with PayPal, and there is not minimum payment, you will get your money even if you are making only a few cents.