It - offer of conciliatory points from front desk clerk for minor issue - has happened to me several times and at several chains - Hilton, Starwood (pre-merger), Marriott etc. Also happened at least twice for extra points for not getting housekeeping. In all cases, not worth my time to follow up without written record of it being offered. A couple of times it has been offered in emails from management, and in those cases I do follow up with them directly if not received and they have always arranged it.