Following a reorg that brought Condé Nast’s online ad sales under one unit in January, the company has laid off staffers at the U.S. digital unit. Roughly 20 to 30 staffers were let go, a source told paidContent. The comes after the publisher laid off four individuals at its UK digital operations on Tuesday. These cuts are separate from the wider cutbacks that are underway at Condé Nast and were done last fall, a source told paidContent. The thinking this time out was that certain areas needed to be streamlined since the creation of Condé Nast Digital. “For instance you don’t need 3 separate infrastructure groups: one for old CondeNet, one for magazine web sites and one for Brides.com.  So unlike the layoffs we did at the end of 2008, which was about reducing costs across the board due to slowing revenue, these layoffs are about creating one unified staff.”