I find that lately I've been clicking an average of 200-300 ads per day. My highest amount in 1 day so far has been between 500-600 clicks.
Seeing that you make $0.30 every 1000 clicks, and payout is $3.00 minimum, you would have to click 10,000 ads just to reach payout of $3.00. At first glance, it might not seem worth it, but you have to keep in mind that for every credit you earn, you are getting a hit to your own site, so it's better then paying for advertising

And at least these are gauranteed clicks.
Also, I currently have won $0.09 to date from the bonus clicks at the regular intervals, and also won 500+ banner impressions.