actually, I don't think their business model relies on the ads. They mentioned a bunch of other features, I think this is a pretty clear-cut freemium SaaS mode

actually, I don't think their business model relies on the ads. They mentioned a bunch of other features, I think this is a pretty clear-cut freemium SaaS model. They send you the 20 pics a month, and try to upsell you with nicer ones. They'll probably say "only $5 a month and your 20 prints can have rounded edges, $10 a month and you get 40!" The ads on the back of pictures seems almost like a ruse to convince people that this is a real business (because upselling is a lot harder to explain to people than "ads")