Last, but not least, please also have a look at your email settings in your profile: https://engel.events.ccc.de/settings/profile
Please make sure to check the last box ("To possibly receive vouchers..."). As usual, we currently do not know if there will be Angel vouchers for #40C3 and if there are, how many hours are required to get them, but if they exist, you want that box checked to get one.