There won't be any lubrication based failures, so there will be no cost to Yamaha due to offering this program.
Yamalube is fine lubricant, and I use it myself.
But lubricant failures in the modern era are pretty much nonexistent.
If the engine fails due to a friction or wear issue, it is always because of loss of lubricant or loss of coolant, caused by failure of an oil pump or water pump, or by a catastrophic leak.
There are other lubricant companies that have offered similar "protection" to their customers, but really it's just a meaningless advertising gimmick. Of course they are vouching for the quality of their lubricant when they make this guarantee, so that's worth something. Like I said ... I use it myself.