Reportedly netsurfers had been brainwashed to click Adsense ads. I visited a website and read that "The nice thing about these adboxes is you can use them on the same pages as Google Adsense! If you make them a different color, Google says using them is just fine." Apparently there is a progam to display ads of ClickBank, PayDotCom and AdBox having the same as that of Adsense Ads but in a different color. It is also reported that ClickBank, PayDotCom and AdBox pay well. It is true that it is not against TOS to display ads of ClickBank, PayDotCom and AdBox looking like that of Adsense ads but in a different color?
From the Google AdSense help center... So yes, it is true. If you have specific questions about implementation it would probably be best to contact Google.