it was.
“Advertising for gameplay activities should be done by a WoW player-character who intends to participate in the gameplay activities. This means there should be no cross-realm advertising, and there should be no advertising from non-participating players.”
It was. Look and some of the blue posts. Also cross realm advertising/boosting is banned as well.
Well, they should enforce this by banning accounts of those reported doing it. Like I said, boosting is bad, mmm k. it it’s bad.
I still think the solution I mentioned should also be considered.
At this point they should just implement a LFB tool.
In the post, there was a specific carve out to allow for characters that will be participating in the boost to advertise it.
If it’s actually RMT or if the advertiser is using a level 1 burner toon, report them. That’s against the Terms of Service, plain and simple.
So much misinformation. I believe the policy is still pinned right at the top of GD, go read it.
Now you’re up to speed! 
there was a blue post that they are not allowed to advertise on any character that’s not part of the boost. level 1 for a friend for your guild ect. if you’re not there on the toon that spams its against tos
It would be best to stop trying to ban the burner accounts and see who the boosters are behind it then ban them
just report for spamming > Selling Boosts… Blizzard sent me a message top right corner by the map a thank you note. lol just report all sellers and u good
And I hope that they give you a time out for false reporting as well. Not all boosting is against the ToS.