Allow Constant Contact to publish to your social media accounts

I am really curious to know when you connect your social media accounts to Constant Contact, especially Twitter, can Constant Contact follow and unfollow accounts and make posts without the user prompting these actions?

I know the general permissions described in the article on this subject lead one to believe it is only when prompted by the user.  However, when I went to connect my Twitter account, the permissions I was asked to give did not offer any reassurance that these actions are only taken when the user prompts them.  I just want to make sure before I connect my accounts, especially Twitter.  I am not comfortable with Constant Contact taking these actions on my behalf without me prompting them.