if you add more than 3 ad zones then your site will look more like a marketing site and bounce rate will be very high. to make the conversion happen keep the advt low and more content.
if you use blogspot then u increse this...but u use wordpress then u past the 4th ad then 1 of them is not display,,,,
There is a way to add more than 3 ads per page, but as you may notice its against Google AdSense Terms of Service and your account may get banned for doing that, so I suggest staying with 3 ads per page.
Thanks for replying ever one but I wanted to ask AT HOW MANY SITES CAN I PUT ADSENSE ADDS WITH ONE ID?
You can ad other types of ads, just not adsense. Try some of the cpa networks out. cj.com linkshare.com etc