People don't respect things that are free.
I learned that quote from a man who runs a non-profit organization. Image that. A man who solicits donations for a living candidly told me "people don't respect things that are free." You know what? He's right.
Free advice. Free upgrade. Free entry. None are valued. Free advice is seldom wanted. Free upgrade was something you were going to get anyway. Free entry? The band playing tonight must not be any good.
People associate the value of service with the amount of money that is exchanged for it. How else do you think that lawyer can get away with charging $400 an hour? People naturally make the assumption that if it costs an arm and a leg, then it must be worth it.