What would happen if a non-logged-in user were to pay for a Stripe subscription? Is the subscription then linked to the e-mail that the user put into the payment form?
User account will not be created just through payment unless you redirect them to signup
That’s clear, my questions is rather about what happens in Stripe 
Does Stripe simply create a client with the email address that was provided at payment?
If that is so, then it wouldn’t be a problem, as I can just ask the user to then create a profile.