I just got to join this publisher program where you get paid £3 for every advert displayed on your site. Up to 5 pages per site and you can add up to 5 sites. Which means you can make up to £75 a month!
I have seen it working on blogger blogs as well! (blogspot)
The program works like this: You sign up and add the pages you want them to display the ads on. They will match up a relevant advertisement to your page. You add the advertisement to your page. After a month you can receive the money to your paypal. Its totally FREE to join with no risk at all.
There is no PageRank, click through or traffic requirements. You just get payed for displaying the Ads! That makes me wonder.. hmm…
Currently, when adding a website, you will be required to add your website under one of these categories:
Animals & Pets
Arts, Crafts & Hobbies
Automotive
Business
Careers & Employment
Computers & Networking
Do it Yourself (DIY)
Education
Electronics
Entertainment
Fashion
Finance
Furniture
Games
Government
Health
Holidays & Special Occasions
Home & Garden
Home Life
Industry
Internet
Kids and Teens
Legal
Literature
News
Online Business Tips
Personal
Professional Services
Real Estate
Recreation & Leisure
Reference
Reviews
Science & Technology
Shopping
Society
Sports
Travel
Webmaster Resources
Website Technologies
Writing
Miscellaneous
Insurance
Let me know if you joined 
JC
P.S. You can post about it in your blog and refer other’s to join, don’t forget to link back to this post
P.P.S. Do you have an facebook account? Join Webmasters Society Facebook Group!