On searching around, fortunately found the T&Cs:
So those coupon are meant to be still valid from today til Dec 3rd. There were not valid til today but are meant to be valid now til Dec 3rd. So them not being valid I classify as an Anker.com site error.
But..... Anker tends to not work weekends, it is weekend now, so far from optimistic it will be fixed til Monday or Tuesday.
@AnkerOfficial - error on your anker.com
As Monday is Nov 27th, that gives time for this error on Anker.com to be fixed before Dec 3rd.
I'd just hang fire, not give up, til Monday or Tuesday.