For the past few years, Gregory Bylos has been doing pretty well out of Minecraft. His company, Mineplex, runs a server network for fans of the massively successful construction game. As well as giving players all over the globe the chance to build in the same worlds together, Bylos and his staff have developed a range of custom Minecraft modes, challenges and maps. Here, you can play things like Castle Siege, which turns Minecraft into a full-on fantasy war game, or Super Smash Mobs, which re-creates the Nintendo fighting game series Super Smash Bros — but in Minecraft. It’s immensely popular. Over one million people a month come to Mineplex to experience the company’s modifications and community features. That’s a lot: there are m registered users, over 14m sales on PCs. But there’s a problem. Now the previously benign Swedish studio is putting its foot down, and a fissure has opened up across the once peaceful Minecraft community. The trouble started on Thursd...