I don't think there is a limit on how many codes you can use.
As for shipping, I'm no help since I'm in Canada. I know they often have free shipping within the US with a purchase over X (right now it's $30).
Also, whenever I need to place an order with them, I Google "Shutterfly coupons", "Shutterfly discounts", etc. Often enough, I manage to save some extra $$ that way.
Re: Shutterfly
I don't think there is a limit on how many codes you can use.
As for shipping, I'm no help since I'm in Canada. I know they often have free shipping within the US with a purchase over X (right now it's $30).
Also, whenever I need to place an order with them, I Google "Shutterfly coupons", "Shutterfly discounts", etc. Often enough, I manage to save some extra $$ that way.