Referral System:
Linkbucks now has a referral system

For every member you refer to Linkbucks, you'll get 10% of that person's earnings for life. But that's not all - you also get 5% of the members that your referrals send in! On top of that, you get 1% of the members that those members send in as well! The earnings from members you send our way will really build up quickly.
The reason i'm posting this is because I have registered for linkbucks less than a week ago and have already made $6 with practically no real work/effort.

Normal System:
Their rates are much better than similar rival programs such as usercash or urlcash, 1$/3500 clicks x ~85% - note especially the high percentage of earnings that goes to you, whereas on usercash I have found it to be ~55% and on urlcash to be ~70%.