Couple of vouchers from graze.com - healthy snacks

I got these vouchers after trying out one myself, and my friends aren't interested in them. Figure someone here might want them instead?
Codes for 5 vouchers: KGRGWK1 and YXR49KD
Good for one sign-up each, if it doesn't work that means someone's already used it.
"Friendcode" to get 1st, 5th and 10th deliveries free: SITIHA9XB
These were printed a couple of times, I don't know how many different people can use them.
Go to http://graze.com to use. Not for existing users. They ask for your credit card details at sign-up. Check their terms and conditions, please.
For the record, I liked what I got in my first free box, and will pay for my second, but I am not sure how long I will stick with it.