they probably had a warning of mailchimp that putting someone on a mailing list without their consent is a forbidden use of mailchimp.
source: I worked with an organization which put a lot of people in their mailchimp mailing list
source: I worked with an organization which put a lot of people in their mailchimp mailing list
But that was after I received a SPAM email saying "Welcome to our newsletter" in my personal GitHub account when I wasn't part of that audience.
You can see my interaction with someone from our team here: https://github.com/OpenBB-finance/OpenBBTerminal/issues/1625... - When we realize what had just happened.
We immediately deleted that audience (which was our plan all along anyway), but then it was too late, we were trending on HackerNews and Mailchimp pinged us after. After that it was mostly damage control, as there's nothing we could have done to make things better.