What made Blizz change its mind on multiboxing?

This statement will only shoot anyone using it in the foot:

This was a customer service rep, they don’t have the authority to define rules or say anything that wasn’t said or explicitly implied by a Community Manager or Blizzard Rep.

Customer Support won’t be able to provide any more than what is already stated in the Policy Update and Support Article.

https://us.forums.blizzard.com/en/wow/t/can-you-please-clarify-a-few-things-regarding-multiboxing/707988/25