Party Pooper mode in MailChimp is where the MailChimp monkey doesn't tell any jokes. By default, the mode is on so I guess these 39,975 went out of their way to

Party Pooper mode in MailChimp is where the MailChimp monkey doesn't tell any jokes. By default, the mode is on so I guess these 39,975 went out of their way to turn off the jokes.