How to Define No of ads in a block

Dear DP members
I want to know , as i have seen on some website, only three ads in a single ad block and no extra ads or browser. How to do this.

Regards

 

Well you can define no of ads in some ad unit .... and some of the site has privelige adsense account and they can modify ad unit as per their requirement

 

Do you know how to upgrade into privilege adsense account.

 

You need several million ad impressions a month, then they invite you to be a premium publisher. Easy peasy - you don't have to do *anything!*

 

But ii have seen such sites whose PR is not very good and also not have very good alexa. How did they manage it

 

I just found this article on this type of ads. and The author is claiming that this is real and approved by google for your kind consideration.
http://www.cravingtech.com/more-google-adsense-formats.html

 

If you read the post, you'd see they are in a revenue sharing deal with someone who *is* a premium publisher. I've also seen lower traffic sites get access to the other ad formats as they've been invited into a beta testing program.