I see these disputes regularly and it saddens me as I like and respect some of the posters embroiled in this never ending circle.
Smurf if only the Charity quizzes were not asked here or at least until the last week or so then Answerbank would survive trust me , the site is far bigger than that.
I regularly answer Crossword questions that have far bigger prizes, the difference to me is that they are ephemeral usually have a short closing date and are not to help a small struggling charity (or even a large one).
I suppose it all depends whether you feel an allegiance to the setter, the cause or indeed some type of quizzers ethic...therefore we shall never resolve this I fear.