Your observation is interesting, captchee. I think the peculiarity comes from customers who've spent long years with low and hard-earned incomes, Depression children cautious of ripoffs, a cultural thing.
It shows up among million-dollar hockey players, arguably the stingiest clan of athletes, who were paid nothing or peanuts before they got into the big leagues. They've been known to rent out their reading material to teammates on long flights.
I think customers raising eyebrows about cleaning up locks and hardware is also a cultural thing---as is not hunting and laying up guns because of the price of non-tox shot and shells. Peculiar but understandable to me.