Let evolution take it's place here,if the festival works,it works. If it withers on the vine for whatever reason, that's the way it goes.Performers get the chance to promote their CD's so there's the chance of making something. As a positive contribution there could be a bucket available at performances then if audience members have enjoyed what they have heard but maybe don't want to buy a CD they could make a donation via the bucket. In essence pretty much like busking.Putting on a festival is like an iceberg,you see the bit above the water but there's a huge amount of organising (often done voluntarily) underneath. I'm looking at this from all angles as a paid musician,a play for free musician if it appeals,an open mic from time to time,an organiser of events (usually paid)& a festival volunteer too..