Business cards have been a lucrative market for many years. For you to be able to tap into this market, you only need two things.
If you have a website, you can put up a page about business cards. When people get to your page about business cards, they will see an ad for free business cards.
2. AzoogleAds account
Azoogle Ads will pay you every time someone orders free business cards. You put their ad on your website and cash in!