I am interested in using the photography for packaging. The units will be significantly lower than 500,000, but I had a question about press and distribution. If we were to sell on a TV shopping network that has a viewership of more than 500,000 would that be an issue? Or is it just the printed item itself that can't go above 500,000?
I would advise you to use the Extended license.
You may also see Stock Licensing & terms FAQ: Where can I find the terms and licensing information for Adobe Stock? for additional information.