About.com, the online network of special interest communities, enjoys “unbelievable margins” from Google AdSense, said Martin Nisenholtz, who heads digital operations at The New York Times Company, which owns About.com Nisenholtz was a panelist Monday at the OMMA conference where I taped his comments. (His reference to AdSense comes up at 2:45 in the clip.) He says that companies who create low cost, highly verticalized and contextualized content will get “very rich” from AdSense. Headds that AdSense does not perform well for New York Times news coverage. Andy Plesser, Executive Producer Production note: Sorry for the really bad audio as I was unable to connect to the event sound system from my location.