why should my appreciation be diminshed because it occurred regularly,my appreciation is not diminished when I am playing IN irish pubs and I receive a tip.I never expect anything apart from the fee I agreed. it is the same with cd sales,just because I sell 5 one night,I dont feel aggreived when I dont sell any,That is the way the cookie crumbles.
You may be above such things but most aren't.
If tipping became the norm then it becomes 'expected'. If your expectations are not met you feel aggrieved. The example I gave of waiters is a well-known one.
At the moment it is not 'the norm' so it is heartening when it happens!
No-one on this thread is saying it should be banned - just that it should not become 'the norm'.