Normally when you buy something and you break it, you get nothing. That is unless you pay a monthly or annual insurance fee, and then you will generally get an item at full price, less a deductable. Or, at time of purchase, you can shell out a hefty additional chunk for a 2-3 year limited warranty.
Getting full initial price credit after beating the hell out of a knife for years is an amazing deal. It means you got all of those years free. The standard Busse & kin warranty is pretty rad in my book. I would never feel entitled to more.
Very generous of Jerry Busse.