Why a capped list beats an open one
An open registration looks generous and behaves badly. Two hundred names collect, the meeting room holds fifty, and you spend the week before the session writing apologies or hoping nobody notices. The people who did notice are the ones left off whatever you prepared โ the handouts, the small-group exercise, the certificate you print yourself afterwards.
A seat limit reverses that. You pick the number the room can genuinely serve, the page enforces it, and the last registration arrives with the same experience as the first. When capacity is reached the page says the room is full. That is not a failure of the invitation; it is the most credible sentence on it.