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Maybe the Download & Instructions would work and I agree that low volume individual sales could work (though I'd have to figure out a way to automate). I was more thinking along the lines of - I'm taking preorders (though you could extend to early access), and I'd like to send a "special" thank you to those who take the leap of faith to preorder. I would turn that feature off after the product is in full release (or maybe you'd just change the email). Just looking for a way to send an automated email after purchase. Maybe a feature request to consider for the site.