433 will randomly select a winner from all entries unless otherwise specified. The winner will be informed personally. The winner's name will only be used in the winner announcement if the winner has given explicit permission to do so. The winners of Instagram contests are always publically announced by their Instagram username.
The conditions for entering a contest or giveaway may require you to enter your e-mail address. Your e-mail address will only be used for communication about the giveaway or contest. It may also be used for important general announcements about 433 as a platform. Your e-mail address will never be shared with external parties.