I don't know exactly. But when you find this information in websites like www.websiteoutlook.com it is around $700 a month. But Maverick is specifying $100 a month. I don't know the information given in the website is true or not.
But you can't trust those sites. Try any site which has no ads also. It will mentions some income. It is displaying results based on traffic rather than clicks.
Please don't believe those sites. Do you believe a site with 7K-8K pageviews a day will generate $25 per day? It is simply impractical. I am not sure about websites with US traffic, but this is not possible for websites with Indian traffic.
It means before declaring the share of each the total revenue generated per month is to be published.But I think to avoid this type of anxiety revenue per week may be published.