Previously for Automation Rules related to email opens and link clicks, we only support "positive" behavior -- i.e. if contact has opened emails or clicked links.
With this new update, we now support "negative" behavior as well -- i.e. if contact has NOT opened or has NOT clicked links for sequence emails.
From inside your account >> [Email icon] >> [Automation] >> [Rules].
Then under [Triggers] >> [BirdSend] >> [Hasn't opened email] or [Hasn't clicked link]:
Once you've set up the Triggers (hasn't opened or clicked link), go to [Actions] and choose what you want to do with these contacts.