Some people derive satisfaction or sense of superiority from seeing people caught out, I don’t understand this. It actually seems for more prevalent in regard to frequent travellers, maybe it’s associated with type A personality.
i see no evidence of that here, jealousy to the Op getting such a bargain yes, people who like the rules as they are as it benefits them as FF, but certainly no satisfaction at another person’s misfortune; I’d give up on the psychology hypothesis if I were you, not sure it helps anyone.