U.S. Mint Data Mining & Credit Card Privacy

This freetimes.com article on U.S. federal government surveillance mentions the U.S. Mint's credit card data mining program:

Unlike the NSA and Treasury spy programs, a U.S. Mint program that trawls through your credit card data when you make online purchases isn't aimed at terrorists. It was built to spy on ordinary Americans in an effort to "detect criminal activities or patterns" and "stop fraudulent activity involving stolen credit cards." Yet very little has ever been written or reported about it.

The article also mentions the DIA's purchase of Verity K2 Enterprise software to search the databases of other intelligence agencies, and IRS's Reveal, and others from the GAO report on government data mining.