Under its guidelines on what constitutes spam, Twitter says it looks out for users that "have followed and/or unfollowed large amounts of accounts in a short time period, particularly by automated means (aggressive following or follower churn)".
To be clear: @SKYNZ, your Unsullied campaign is an abusive use of Twitter. You are spamming people. It is against @Twitter's terms.
Posting duplicate content and updates over multiple accounts and sending large numbers of duplicate replies or mentions also go against Twitter's spam rules.
Advertising group DDB New Zealand appeared to be behind the campaign. Comment has been sought from Sky TV and DDB.