A friend in Sydney sent me plinko while we were chatting about the kind of games that don’t need any effort. I didn’t take it seriously at first, but I get the appeal now. You just drop a ball, and hope for a good bounce. What makes it work is how fast each round is—you can play five games in the time it takes to scroll Instagram. I had a random win early on that gave me enough motivation to keep trying it out every now and then.