Wizards of the Coast and Open Gaming License. Explanation: They made the OGL during the dawn of third edition D&D, which let other publishers (from larger ones to indie ones) make and sell their own work using the d20 system the game ran on. Essentially, it was the equivalent of a game publisher letting people make and sell their own fanmade mods for their game or to sell their own games based on the engine. Cut to 5e, which ever since D&D got big, was known for having a massive amount of homebrew content, some being sold by said fans creating it. Then WOTC attempted to revoke the OGL, even removing the original text saying it can't be revoked, and trying to do so on archived versions on the Wayback Machine. Suddenly, nobody was allowed to make homebrew content other than what was allowed on their official site, and any content they make on said site may be sold by WOTC as their own product without credit to the original creator, in addition to preventing all other virtual...