SAN FRANCISCO – MARCH 30: Red Netflix envelopes sit in a bin of mail at the U.S. Post Office sort center March 30, 2010 in San Francisco, California. If the U.S. Postal Service wins its bid to drop Saturday delivery service, customers of the popular online video rental company Netflix could see gaps in DVD delivery and will have to do without Saturday delivery, a popular day to receive movies. (Photo by Justin Sullivan/Getty Images)