Got the following email from them on August 15:
Dear NJOY Customer,
First and foremost, we'd like to thank you so much for making our free sample program such a phenomenal success!
Due to the overwhelmingly enthusiastic response (50,000+ free samples ordered in two weeks!) there may be a slight delay in shipping your free sample. You will receive your order by the end of August.
Thank you so much for participating in our Free King offer!
Sincerely,
NJOY Customer Service Team
Still haven't received it, but at least they acknowledged that I ordered one.