So I read this article after it was highlighted on Business Week’s Well Spent  by Amey Stone and I was amazed to find the majority of credit card holders first find out about a credit card via direct mail. Vertis  did the survey in Jan 05 and discovered that what came in second at a piddly 11% was “Informed by someone in a store.” (which explains why they peddle store cards so strongly).
Read the article quickly because after Mar 2, 2005, it’ll only be available to paid members of EMarketer.com. The statistical breakdown is as follows:
Direct Mail – 53%
Informed by Someone in a Store – 11%
Bank – 8%
Friend/Relative – 6%
Internet – 5%
Television – 4% (Capital One commercials are starting to get stale!)
Special Event/In-Person Promo – 4%
Advertising Inserts in a Newspaper – 2%
Credit Union – 2%
So that’s why you get all those junk mail offers for 0% balance transfers and other super-low rate credit cards in the mail all the time, it is by far and away the best way for a credit card company to lock you in.