I got in on the deal for C1 Pro, checked out fine and get my license but did receive server errors when I got to the step to display the receipt.
What time did try it? It looks like they ran it exactly 24hrs and started in the EST time zone (which is annoying for west coasters as they didn't' specify what timezone on their email). So basically if it ended at midnight EST, people on the left coast would've been screwed at 9pm PST
Write them and let them know what's going on, maybe they'll honor it