Mojang issuing major changes for Promotional/Commercial use of Minecraft
Minecraft is a universal tool, as it is a video game. People can build all kinds of amazing things with the open worlds the game provides and many people use the game as a tool to show off projects and other important commercial stuff. Mojang and Microsoft are changing how this is going to work going forward and the official comments about this are below. Source: Mojang Blog – Mojang Documentation