Who Gets the Highest Ad Rates Online? 
 
 With All the Talk of CPMs Going to Zero, Here's a Survey of Who's Commanding Top Dollar 
 
 NEW YORK (AdAge.com) -- Online ad rates, we're told, are on an express train to zero, helped along by gagillions of impressions generated by Facebook, Twitter and its ilk, and the networks, exchanges and targeting technologies that allow advertisers to buy audience as a commodity, without dealing with individual sites at all. 
 
 And while the recession has put another hit on CPMs -- the term ad buyers and sellers use as shorthand for the cost for 1,000 impressions -- across the web, some sites can still pimp fat ad rates either by virtue of their reach, specialized audience or unique environment. 
 
 Who's getting the best ad rates on the web today? The slideshow that follows, culled from agency buyers and media sellers, is far from scientific, but gives a good sense of who can still charge bank and why. 
 
 Got some other fat CPM candidates? Leave them in the comments section. 

 What is the difference between "real" celebrities and "online" celebrities when it comes to social media marketing? The real celebrities get paid. 
 
 Last December, social media guru Chris Brogan received a $500 gift card from K-mart to write an entire blog post about his visit to a K-mart store. Reality show vixen Kim Kardashian's rate? $10,000 per-tweet, according to Advertising Age's Michael Learmonth. Yes, you read that right. Ten. Thousand. Dollars. Per. Tweet. 
 
 Kardashian works with "in-stream advertising" company Ad.ly, which also includes Stephen Colbert, Lauren Conrad and Dr. Drew as clients. Derek Rey, co-founder of Ad.ly, told PRNewser today Kardashian "can command" $10,000 per tweet and that Ad.ly limits its "publishers" -- as it calls Kardashian -- to one paid tweet per day as to not alienate her audience. "We're not a polluter," Rey said. 
 
 How well is Kardashian, and other celebrity publishers selling? "We could sell out that inventory if we want to, but we have a lot of advertisers," he said. "We're filtering them before we go to our talent." 
 
 The above Tweet from Kardashian sure reads like an advertisement, but contains no disclosure. Rey told PRNewser that Carl's Jr. is not an Ad.ly campaign. Indeed, Kardashian just inked an endorsement deal with the fast food chain to promote their salads. Despite the fact that she is a public spokesperson, Rey told PRNewser that with any instance of one being compensated, "you have to disclose."
– In examining an Advertising Age slideshow on online ad rates, one of the things that caught Joe Coscarelli's—and no doubt most readers'—attention is that Kim Kardashian earns a whopping $10,000 per tweet when she shills for companies. Kardashian, who has 2.7 million followers, earns such big bucks by hooking up with the company Ad.ly, which helps celebrities make money off their Twitter accounts. Generally, they're limited to one such commercial tweet per day. But ten grand? "As depressing as that reality is, it speaks to the shakiness of the whole" online advertising system, writes Coscarelli at Mediaite. "No matter how focused the content or how technologically advanced the pop-out, screen-hogging spots are, a simple link from a celebrity spokesperson brings in more for far less work. Does that mean that online content is worthless? More likely, it just means the system is broken—or at least, not the way of the future. Or so we hope."