Coupon code not working here either.  Says 'invalid or expired coupon'   Dunno where Smith Micro is located but US Eastern time right now says 9:37 pm and West Coast is 6:37 pm so well before the expiry time of 11:59 pm on 9th Sept there.

Wonder if SmithMicro makes good on their offer even after expiry time as long as you report it before it happens?