Quoted from MrBally:The warranty has been written for Commercial use. True route operators have a service crew to repair things that break. Moving parts break. A steel ball hitting things will eventually cause them to break. Those playfield parts are typically not warranted.
Commercial route operators expectation is that the control circuitry will be trouble free for 2-3 months while the machines rake in serious money. After that, it's pay-as-you-go for parts and possibly labor if the operator is not capable of repairing their own circuit boards.
Also routed pins get more plays early for when things most likely defective will break. A HUO pin might see in one year the amount of plays a good location will get in a few days or weeks. The manufacturers really should define separate warranty periods for commercial and personnel pins