I just started my campaign today. i was trying Adwords but I had to pay liek 2 bucks for every click. On SU i get all my visitors for 5 cents. I figured it was worth a try. Did anyone ever try this before? Let me know how it worked out for you!
heres a link, i think they are 5 cents each no matter what the subject, thats good for people who have health or finance sites! http://www.stumbleupon.com/ads/
Stumbleupon traffic notoriously doesn't convert. People click, look for a second, click, another second, click.
Piqqus.com also provides this service. If you register with this url: piqqus.com/signup.php?r=5318&c=5ed76hj2td486a650f56 you will be able to refer others and receive stumble/digg/propeller points from people you refer. If you sign up without being referred, you are not given the option to refer others (and earn more points). PM me if this invite gets used up as each URL can only be used once.
I don't like the whole stumble upon basis. The thought of downloading software which monitors my browsing behaviour is frankly worrying and at some point a good software hacker will find a back door to their system and then have access to the personal data of millions of people. Quality of stumble traffic is very very poor.