Today 31.1 Blizzard banned community boosting, but allowed to boost only as guild/single member. This action was followed by multiple posts on blizzard forums and many angry people. 

Why would Blizzard ban crossrealm boosting? There is legit nothing wrong about it if it's for ingame currency only. We do not want any RMT or anything similar to it, we just want our weekly income back!

Link to official Blizzard post: https://us.forums.blizzard.com/en/wow/t/policy-update-for-organized-in-game-services-january-2022/1176836