Well, I emailed Craftsy's customer service and got this response:
Thanks so much for your interest in Craftsy! Unfortunately the offer your friend received/you saw posted on the blog was an extremely limited offer we sent out only to members who had been with us for a while who hadn't yet enrolled in a course to let them have the chance to experience a Craftsy course for an extremely low discount. This offer expires in a week and only applies for them.
They sent me a code for One class at $25.
I'm now a LOT less interested in taking a class from them than I was before!