Daniel Roberts, CEO of Decrypt, wrote on Twitter that they had used Mailchimp for more than four years, but that the company had "deactivated our newsletter account with no warning or explanation".
Mailchimp's acceptable use policy bans businesses offering "Cryptocurrencies, virtual currencies, and any digital assets related to an Initial Coin Offering". It's listed among other industries that they identify as having "higher-than-average abuse complaints, which can jeopardize deliverability" including work-at-home scams, make money online, and lead generation opportunities; gambling services or products; and multi-level or affiliate marketing. In an email reportedly sent to Friedland regarding his suspension, Mailchimp wrote, "We cannot allow businesses involved in the sale, transaction, trading, exchange, storage, marketing, or production of cryptocurrencies, virtual currencies and any digital assets."
In April, Mailchimp had experienced a security breach in which audience data was taken from around 100 accounts in finance and crypto-related industries.