In the 2016 movie Nerve, it is established that the game runs on a decentralized platform, when every phone player is a node itself and thus can't be shut down by terminating one single server.
It is also established that at least some dares and decisions are chosen by watchers voting. However in a scene where Vee is trapped inside a container, an old iMac is there and the Nerve "voice" talks to her. It also seems to know where every player should be in the right place and right time with the right things (Ian has a book that Vee likes and the game knows that by scraping her Facebook, the stairs for the Sydney dare showed up by two random dudes), which doesn't seem viable in a direct democracy thing.
Is the game controlled by some sort of an artificial intelligence?