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…
They're not "censoring people for discussing a perfectly legal technology"; read their policy carefully: >>> It’s important to note that this update to our policy does not prevent the discussion of related topics in messages sent through our platform. For example, journalists and publications may send cryptocurrency-related information as long as they’re not involved in the production, sale, exchange, storage, or mar…
There's no way MailChimp can know about any of this with any reasonable amount of certainty unless they're actively violating their user's privacy and reading the e-mails themselves. Machine learning is horrible with context.