MInecraft developer Mojang has officially banned in-game advertising and promotion in its latest set of commercial usage guidelines.

Companies and other commercial or political entities can no longer market content unrelated to Minecraft in the game, either by building ads inside it or running mods or servers dedicated to promoting a product or service.

"We want to empower our community to make money from their creativity," said director of creative communications Owen Hill, "but we're not happy when the selling of an unrelated product becomes the purpose of a Minecraft mod or server."

Fans, however, may continue to create builds and servers based on commercial material (like movies or other video games), as long as they are not hired to do so.

"It's worth mentioning that fans of a particular restaurant, movie, or some other thing are still free to build things in Minecraft that represent or celebrate it so long as the goal or focus is not to promote or sell that stuff," Hill said.

"The new rules only apply to companies or organisations that are using Minecraft to sell their products or promote their causes."

Previously, some companies had built promotions inside the game, like Verizon's working smartphone or Disney's recreation of the titular city from the film Tomorrowland.