For example, imagine you only collect an email at sign up (no name, no country) and you state in your EULA that you might use the email to send onboarding infor

For example, imagine you only collect an email at sign up (no name, no country) and you state in your EULA that you might use the email to send onboarding information or commercial communications (promotions, newsletter) that can be opted out. If you do not have any means to know the country where the owner of the email is located, how do you ensure the right of non-EU citizens to receive the commercial communications they have agreed to receive in your EULA unless they opt out later? If you do not collect your user country for privacy reasons (I would be wary to sign up for a trial of a service who wants to know my citizenship), how can you prevent EU citizens from using your product?