Thanks, I just bought it, in the US. 4/2/17. I clicked through the banner link on circuitstudio.com to get to the special offer on newark immediately. I also bought the maintenance at this time, to hedge against a price increase. Anyway just 1 year of maintenance isn't at all useful. Funny advertising from Altium, dissing subscription licenses when in fact CS also really decreases in usefulness without the maintenance (includes Vault subscription).
The email from Newark said, "order placed". No license has come to me yet, so presumably they can still cancel the order. That would be pretty bad form though, if they want the offer to expire I should not have been able to order in the first place.
FOLLOWUP: I got the license. I have a slight buyer's remorse, as I can't import my Proteus data and CS doesn't have the IPC wizard so I still have a crap workflow for footprint creation. bah. I think I did know this from prior research but forgot about it due to sale fever. At least I can import my Eagle data.