My take on these offers, is that it really is the best way for the manufacturer to ensure that any bonus, or price reduction, gets to the customer, not any of the middlemen.

Last time when these came out, which was early this year for the back to school stuff, I bought 10 boxes and effectively received a 20% discount.

Although the 25 sheet packets with the extra 10 sheets works out at 12% (money wise) cheaper than the 100 sheet boxes, I really do need (or like) the boxes for storing/transporting/keeping dark, paper and/or prints far better than the flatter packets.