use PHP Randomizer and switch between 3 or sets of google codes, thenyou will break no rules but get the same results
agreed... plus, if you use this method rather than the "multiple pallet" option in adsense... you can use channels to track the best performing colors.
I don't think that's correct. In my experience, using the new AdSense Javascript, this technique still works. Even though Google supplies it to you without the "google_color_xxx" declarations, you can add them and they will override what you have configured in AdSense Setup.