GMAC lender Ditech stops advertising

"While it's common for advertisers to come and go, sources familiar with GMAC said the absence of Ditech ads has sparked some concern because it is the most profitable part of GMAC's money-losing residential-mortgage unit, Residential Capital, and Ditech relies on its ads to drum up business. Without Ditech, GMAC will face even greater pressure to dump the mortgage operation, which it is currently trying to sell."