These small savings are worth the effort to people who are blowing away multiple times more cash on something else. For example, taking a vacation when they can't actually afford to do so.

I remember traveling as teenager, I setup monitoring system to catch cheap long distance bus tickets.

(I bought some 400km travel tickets costing less than travel to bus station within city)

Some people are in a different situation than you.

They're also worth the effort to me, who values money. Having a lot of money doesn't mean you should be spending it unnecessarily.