To obtain business cards one should have a legitimate business, if you dont and manage to get business cards when they find out they will shut you down.
You don't need a business per say, but they don't like the idea of you using it as a personal card. The regulations behind a personal CC and business CC are different. If you have any form of "business" income. Sell stuff on ebay, make sweaters, fix computers, kid sit whatever that counts as business income.
I see. Thank you for the reply.
There is lot of info on this on the various blogs, one, forget which, does the usual spoonfeeding of what to say to each of the likely questions. But lots of people who don't "really" have a business, e.g don't file a Schedule C, get these cards for the sign up bonuses and the useful categories.