I came across this online deal, and so far I have 70 prints for free. The website says you can get up to 95 free prints. I'm in the process of finding out.
As the saying goes, don't look a gifted horse in the mouth.
Sign up here for 50 free prints.
Answer survey here for 20 more
I'll see if I can add more.
And NO, I don't have any affiliation with CVS.
I found this on www.slickdeals.net