Recent people added to the participants list and to the steam group. Which makes a total of 78 for now and after only 2 days of sign ups. However I think that for now the sign ups will start decreasing a bit and I don't expect more than 100 people to this event. Though this means you will still be all able to play.
By the way, there are still like 10 people missing in the steam group, If you didn't receive an invitation to the steam group but that your name appears on the participants list or that you ignored it by mistake, please let me know.