Is iCloud - Hide My Email a secure service to use as an account email address on things like Stremio?
Turn your vpn on, go to any email servce make a fake one or better yet make a proton email, use that for email.
Save your fale email credentials then while on the vpn login to stremio and make the account with that.
The biggest thing you have to worry about is your ip address and internet traffic. Use a vpn with an email and you will ne good 
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