@Tara536 Life is full of little glitches- fuses blow, washing machines go on the blink, wifi cuts out. I'm not sure where this idea came from that every little complaint or inconvenience is best dealt with by refunding $, but it seems to be quite common. And leads to guests complaining more than they would otherwise, because they assume they'll get some money back.
Whether these folks were scamming or not, to me, "Stove and oven don't work" report at 10:20 PM, would get a "Oh, I'm so sorry-I'll be over to check it out first thing in the morning" response.