The X-Cards are best used when you have a chance to explain SFI or Tripleclicks to a person, then hand out the card so they will have your personal URL. For example, someone sees your Tripleclicks sticker on your vehicle and asks what it is. Briefly explain Tripleclicks to them, then hand out the card. Giving a card is important because otherwise they end up just going to the main site with your referral ID.
