The double hash ones were meant to indicate that the channel wasn't "run" by anyone officially affiliated with the free software with that name. This isn't alw

The double hash ones were meant to indicate that the channel wasn't "run" by anyone officially affiliated with the free software with that name. This isn't always consistent since there's no mechanism to determine who is officially affiliated with most free software. Additionally the status can change over time making some channels with double octothorpes official without renaming them.