Each business card is available in two versions: a free version and a $3 version.
The two are identical, except that the free version includes the URL www.FreePrintableBusinessCards.net in small letters, which can't be edited out. The $3 version doesn't include the URL.
Here's a comparison of a popular card. The only difference is the URL in the bottom left corner.
The free version:
$3 version of the same business card:
You can pay using your PayPal account or credit card. You'll be able to download the customizable business card within moments.