I thought I'd start a referral chain for the National One Two free promotion. You can receive a free rental day for every two qualifying rentals (2 or more days) up to Jan 31, 2013. A free day rental credit can also be earned when someone signs up for the promotion from your referral link. Free rental days can be redeemed up through June 16, 2013. You can receive up to 10 free rental days via the referral method. We should all try to get free rental days out of this. Just update your post when your free days are filled. For starters, here's my link: http://goo.gl/7uidb Thanks!