This is my list of companies that will ban your business account if they know you're involved with Bitcoin. (NOT ICO's... but Bitcoin specifically)
ChimpMail.com
ConstantContact.com
SendInBlue.com
Twitter.com (they "will" ban small Bitcoin businesses)
Please feel free to chime in if you've had any businesses accounts closed due to Bitcoin.
Are you serious about Twitter? 😒🤔 Although I havent seen any kind of advert about Bitcoin, but I do see some pages that tweets about Bitcoin and they are still up and running without being banned. Unless maybe they started this one newly, maybe due to Facebook did such a thing.
But Facebook has reversed their ban on cryptocurrencies, people can now advertise any form of crypto related business on Facebook now.