The Exit Intent email is one of the top performing email series that very few designer sneaker brands have.
It is driven from a popup when someone goes to leave your site. It often is a last ditch chance to win over a hesitant prospect.
Make sure you coordinate your Welcome popup and your exit intent carefully. Give a compelling reason why people should sign up (which doesn't always have to be a discount). Give one last chance for a subscriber to give you their email before they leave the site.