The Magician Online is a live, interactive, online experience - in
the comfort of your own home. Starring Dan White. As seen by
Ashton Kutcher, Ariana Grande, Chris Rock, James Corden, Jessica
Alba, and President Clinton.
Since everyone who guesses correctly will win, it doesn't matter how many people choose each card. Furthermore, he said only 52 cards, so you might want to change your guess while you still can (I imagine that's allowed).