Well, if you're worried about censorship(and lets be real, 99.9% of what people use mailing lists for won't be affected), don't use Mailchimp.
"We’ve updated our language to further clarify our Rules (Section 17 of STOU), which state that Mailchimp does not allow the distribution of Content that is, in our sole discretion, materially false, inaccurate, or misleading in a way that could deceive or confuse others about important events, topics, or circumstances."
Thanks for letting me know that I should move all of my clients off of Mailchimp. I don't trust Mailchimp's "sole discretion" and interpretation of what is "inaccurate or misleading". What is true and factual is constantly in flux and subject to intepretation and debate. For example, an intelligent Democrat or Republican person, in many cases, have completely different views of what is "true" and "factual". I could apply this to many non-political examples as well.
I'm going to look into moving to one of the many of the cheaper, more trustworthy competitors if what you have commented is true.
"We’ve updated our language to further clarify our Rules (Section 17 of STOU), which state that Mailchimp does not allow the distribution of Content that is, in our sole discretion, materially false, inaccurate, or misleading in a way that could deceive or confuse others about important events, topics, or circumstances."