Right, but we have to rely on the location of the forum servers.
They are located in the US, so you have to follow the laws of that country. Mixers are not illegal, but they are in the gray zone of the law, which can lead to problems (like some that have happened). Casinos are not illegal in the US.

So, the fact that residents (who can be considered employees) are asked to avoid advertising mixers (unless it is true that this request was made), this will allow for a better response to the authorities since they can argue that none of the team is involved in these projects (in a clear way).