Shutterfly offers 99 4x6" Photo Prints for free via coupon code "SNOWDAY". With $5.99 for shipping, that's $0.06/print and tied with last month's mention as the second-best price we've seen for this quantity of 4x6" photo prints from Shutterfly in over a year. (For further comparison, we saw the same quantity for a buck less in July.) Deal ends February 19.
Note: Although the above coupon is good for up to 101 free 4x6" prints, shipping for that quantity jumps to $7.99, yielding a lesser deal of $0.08/print.