Yahoo.com / By Adriana Diaz

Did CBS get "punk'd" by Ashton Kutcher? The actor used his massive exposure on the sitcom "Two And A Half Men" to stealthily promote his personal tech investments. Kutcher, who replaced Charlie Sheen on the show, plays Internet billionaire Walden Schmidt. In this week's episode, Kutcher's laptop was covered

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in stickers for the tech companies Foursquare (the location "check-in" site), Flipboard (the iPad news aggregator), Hipmunk (the travel searcher), and Chegg (the textbook rental service). Well, it just so happens that those are all companies that Kutcher has invested in. Coincidence? CBS thinks not. It's not happy about the product placement because the companies got it for free. A lot of eyeballs saw those stickers. That episode alone drew 20 million viewers, a huge number, though down from the 28.7 million viewers who watched last week's premiere. Foursquare CEO Dennis Crowley was thrilled. During the episode, he tweeted a screenshot of the laptop saying, "Check out @aplusk showing some @foursquare & @GroupMe laptop-sticker love on Two & a Half Men." CBS says unless the companies pay up, the stickers will be blurred out in future shows. But should CBS have seen this coming? Kutcher is notorious for promoting products he's invested in. Last month when he guest-edited Details Magazine, Kutcher got flak for praising companies that he has invested in, without being up-front about his involvement. Kutcher also often tweets about products to his 7 million followers, and there were nearly 30 product placements in his last film, "No Strings Attached."

Remember when we told you that Facebook CEO Mark Zuckerberg pledged to eat only the animals that he kills himself for a whole year? Well it turns out that he had a craving for bison. During last week's F8 (pronounced "fate"), which is Facebook's annual summit, Zuckerberg showed off his Facebook page with an update about cooking bison burgers. That got people thinking: Did the Facebook mogul actually hunt and kill a bison? Apparently yes. In the past he used a knife to kill animals like a goat, a chicken, and a pig. But that's not how he would attack a bison (which can weigh up to 2 tons). Zuckerberg recently obtained his hunting license and Fortune.com reports that he used it to shoot down a bison. On Twitter @jeffisageek wondered, "Did the bison not like the new facebook changes?" What do you think Zuckerberg's next prey will be? Tell me on Facebook.com/AdrianaDiazNews and Twitter @AdrianaTweeting.