Here is another unscientific Google AdSense study on how much one can earn with Google AdSense. Keep in mind that DigitalPoint Forums has one of the largest base of proactive AdSense publishers on the Internet.
A DigitalPoint Forums thread asks how much are people earning on a single day with AdSense? With currently 80 responses, here is the break down.
42.50% (34) said they earn $5 or less per day, 12.50% said they earn between $5 and $10 per day, 20% said they earn between $10 and $25 per day, 6.25% said they earn between $25 and $50 per day, 5% said they earn between $50 and $75 per day, 1.25% said they earn $75 and $100 per day and 12.5% said they earn more than a $100 per day.
Another way to look at it is that 75% earn less than $25 per day or 25% earn more than $25 per day. Only 18.75% earn more than $50 per day and only 13.75% said they earn more than $75 per day.
Forum discussion at DigitalPoint Forums.