I’d like to retract my answer to this question. Apparently when I bought some prints through shutterfly, I was automatically “enrolled” with Reservation Rewards, and charged a $10 enrollment fee. I had to call them to cancel and get my money back. They were helpful, but it was still a pain in the a$$.
I loved the ease and convenience of Shutterfly, but they ought to end their partnership with this shady company.