This is a good summary. A few relevant facts about the political landscape involved: Bukkit is used by a large number of Minecraft fans to run servers, due to

This is a good summary. A few relevant facts about the political landscape involved: Bukkit is used by a large number of Minecraft fans to run servers, due to the availability of plugins and other improvements in the modded server. The developer in question contributed significantly to Bukkit, and has stated that without the full Bukkit product being open sourced (including the base Minecraft binary it's based around), it's a copyright violation to be using his contribution. This is legal, because of the nature of his code licensing, however, it is not a demand that the Bukkit team can comply with, as they don't hold the original Minecraft code. As such, their only option is to comply with the take down (and not use that code) until such time as Mojang releases the source to the Minecraft code that Bukkit uses. Mojang is under no obligation to do so, because they're not using any of the dev in question's code, as he only contributed to Bukkit. However, Mojang risk upsetting a large portion of their tech savvy and more active user base (including YouTubers and streams), because relying on Bukkit servers is common in those circles.