I got a response from the email I sent:
The state of New York has decided for its citizenry that residents cannot participate in online contests. I will notify the other shops that your state address is incorrect. Don't worry. You are entered in the contest.
(When I submitted the entry, I used my correct email addess and zip code, and just entered any state. So, I guess I'm entered.)
Frankly, I've never heard of such a thing. Wonder what it's all about and whether it's worth following up on??