When Facebook banned blockchain-related ads it was understandable - they are a closed platform and can chose to accept whatever content they decide to. When Google banned blockchain-related ads it was a much more serious issue - millions of websites are supported by Google ads through AdSense and AdX. Google is the main revenue source of the vast majority of publishers on the open internet. It seems incredibly unfair…
You're being ridiculous and disingenuous.
MailChimp has long had a list of Prohibited Content and Sending Subject to Additional Scrutiny that include "perfectly legal" items: https://mailchimp.com/legal/acceptable_use/
When you signed up, where was your heartfelt cry for liberty for people selling pharmaceutical products, credit repair services, daily horoscope reports, or mortgages and loans?
This is just a pet issue of yours and that's why you're upset. Don't pretend this is some great violation of principles.