Like Quim said, we need to manage amount of participants. Not only for fire safety reasons, but also to ensure that we have the community and its contributors well represented. Not that we will be serving anything illegal in Amsterdam, but I'd prefer if our sponsored funds are used for the community not a coincidental visitor. We also need to have some registration milestones in order forecast the final amount of participants. Last year the number of participants grew dramatically in the last week and we ran out of food and almost space. I personally carried some 20 or so chairs to the main room before we opened the show at 09.00. We need to manage the registration in a smarter way with some bonus for early sign-up.