And that is where the problem lies. As you said, new participants are either kids, depending on their parents since they are normally unable to pay their own way yet, or retirees that are normally on limited incomes. Either way, it's not a sustainable source of new blood since the kids are going to probably be short term participants (we all know how life gets in the way of hobbies) while the retirees will have to drop out due to health issues (old age sucks) or lack of funds.