Member Rara Avis
Registration is capped, at least in a sense.
It was open this past weekend, for example, but was closed from Friday to Monday the week before. Essentially, I twist the faucet any time I feel there's too great an imbalance between the amount of work required to ensure our Guidelines are maintained and the number of people who have volunteered to help with that work. When either side of that teeter-totter shifts too much, I close down registrations until a balance is again maintained.
While I feel badly when anyone is turned away, I'm not willing to sacrifice our quality. Growth, as it comes, needs to be controlled at least enough to make sure our problems don't grow faster than our ability to cope with them.