besides at what I charge now. i think people should get something tangible, makes them feel they get their money's worth. it only costs a couple hundred to get the proof prints and box or proof book.
A couple of hundred dollars is significant in terms of profit. I looked at my overall profit per wedding recently, taking into account albums costs, phones, internet, equipment, repairs, tax, etc, and even though I charge fairly well my profit was much less than expected.
Weekend warriors probably have less of an issue with this, since they have less equipment and all the money goes straight into their pocket. Actually that's probably a generally more profitable way to run a wedding photography "business".