http://share.plastc.
1. You will then be asked your email by Plastc,
2. They will then send you an email with the promo code
3. Enter that code when ordering your Plastc card.
4. Once your order is done, Plastc will give you a link like the above that you can share with your friend and that will give you a 20$ amazon card.
So win win for passing the message.
Your welcome