Email is an open infrastructure, if an consensus emerges among the existing players not to allow emails about X then you're free to start your own email service what will feel the gap. If you can't make it stick then the holy free market has spoken.
Wikipedia is currently blocked in Turkey. That's censorship. Mailchimp won't let you use them to send emails about Bitcoin. That's a minor inconvenience.
Wikipedia is currently blocked in Turkey. That's censorship. Mailchimp won't let you use them to send emails about Bitcoin. That's a minor inconvenience.