Sign up for a new account at snapfish using this link
<referral link redacted by Dan...There was no description of the offer on the landing page so I signed up and tried it and only got 20 photo credits after uploading>
upload a photo and you will get 100 free prints free. They currently have an offer for free shipping until Sep. 11. For each additional address that you refer and sign up you get an additional 50 free prints.