Your loss Guest....

I'm hard pressed to think of a 'charity' gig that I've done that didn't lead to at least 2-4 gigs that paid.... often way more than my average fee... Gigs that I never would have got if not for doing the freebie.....

I have also, at such charity gigs met some great people, had some great food & drink, had some great fun, and left feeling wonderful for the whole experience.....

Sorry your experience has been so bad....