This site:
http://www.bitcoinadshare.com/ gives the opportunity to earn some Satoshi by receiving dividends of the site's revenue. The dividends are shared with all the users on a monthly basis, depending on the number of adshare every users claims.
A BitShare is one part of the site's revenue. You can get BitShares by becoming a member and clicking the Claim button. This can be done at maximum once every 5 minutes.
The site is completely free and it doesn't provides a referral system.
This is the link:
http://www.bitcoinadshare.com/Do you use it? What do you think about it?
