Provided the cost wasn't beyond my means, I wouldn't leave.
The best things in life are free - but maybe the vital things might cost a smidgen. I obviously can't speak for anyone else, but I'd be prepared to pay a little more to subsidise those who could't afford the price.
Has any thought been given to merchandizing? How much would members be prepared to pay for products like say, baseball caps, coffee mugs, pens and so on, with the Avalon or Camelot name and logo printed on them?