Newark SPAMs 1447 Eagle CAD Freemium Users

[Someone] from Newark just sent an email to 1,447 Freemium Eagle CAD users offering them a discount on an upgrade. How do I know it was 1,447 users? She committed one of the worst marketing faux pas and included every one of the addresses in headers of the email.

I'm very curious to know how much a list of known Eagle CAD users would be worth to anyone marketing a competing product...