Lol. I have nothing to say if you feel the need to attack someone due to having a different opinion.I'll take that as a "yes" i don't own business and can't relate firsthand to issues and concerns business owners face everyday. You have a warranty for the ability to say no i won't fix past a date, and as a sales pitch, longer warranties are more attractive to gain sales.
Customer satisfaction, good will, business security and longevity, and word of mouth reputation and advertising is the reason you "have a warranty expiration if you don't intend to uphold it"
It's common sense to send a $1 part, i.e., temperature probe, at cost to a customer to retain that customer for future purchases and to have him then encourage others to buy your products.
Any low level employee of mine would send this part to that customer without a second thought.