For example: http://forums.hardwarezone.com.sg/showthread.php?t=1801314 You can see that the box is still clickable .. hmm
They don't look like any Adsense ad I have seen in action before... And doing a "view source" makes it look even more foreign!
Most probable reason is that they may be 'premium publisher' of AdSense (20 million impressions per month). AdSense team offers customized ads for premium publishers.
But doesnt premium account have the same adsense click box thing removed ? I checked several others already.
Dude you picked up a wrong site. Do you know who runs Hardwarezone? singapore largest press holding co. SPS holdings bought hardwarezone from a bunch of local guys for millions of $$$. Now its run by a professional firm i suspect they get over 50-60 million hits per month. At any time of the day atleast 10000-20000 members are online. HW is a premium publisher so they have more liberty than you. Hope that helps.