Give them out at trade shows. Include them with literature requests. Send them to your media list. You are at a party or social or business gathering. You tell some people you have a new internet web business.
Eyes light up, the interest is intense.
But you have only ten seconds to capitalize on the interest. Eyes glaze over. The opportunity is lost. They take the web card and put it in their shirt pocket or purse. Later, they drop it off by their computer and go look at your web site when they're on line.