Adsense earning share between google and publisher

From various resources which i have researched, found that sharing of money between google and publisher is 70% and 30% respectively. Means if an advertiser spend $100 only $30 goes to publisher.

 

$30 is also a big amount for the publishers There are millions of advertisers

 

No and i think it is in reverse.

For google 25 to 30% and for publisher the remaining.

 

but publishers can do nothing becoz he is just a middle man. GOOGLE says he love publishers but he also care advertisers. (In hidden he is doing his biz too)

 

It must be 70 for google and 30 for publishers, the reverse does not make business sense for google

 

Your Earnings from Google AdSense
What you see on the right is a 300×250 rectangular Google AdSense Ad unit. Ideally an ad unit this size should show 3-4 different ads but maybe there isn’t enough inventory and therefore, all you see is 1 ad somewhere near the middle of the rectangle.

 

I think the publisher is getting more.