Almost all top tech companies have multiple @accounts, even Twitter does! I've seen multiple times how these companies post same announcements on multiple accounts. Even Twitter sometimes does that, for example when announcing something important in relation to security or policy, they post the same thing on the dedicated channel and their main channel.

Moreover, there are tons of tools build around Twitter API, like consumer ones: buffer, hootsuite and several other big enterprise tools that enable exactly that - connecting multiple accounts and cross-posting/scheduling the same tweet across all channels (as usually these tools also connect to facebook, linkedin and g+).

So, I still don't understand Twitter's move here, they are effectively declaring most of their business use cases to be outside of the guidelines. I'm surprised.