So for example (this is still my guess on how things are working now FYI)
You go to the park today and you get stopped by a photopass photographer near the main gate for a photo. They take your photo and scan a photopass card and give it to you and your on your way.
Then you see a photographer by the castle and you want family pics there, maybe some magic shots or whatever. You can:
1) have them take your photos and they will scan a new photopass card and give you that card when they are finished (you now have 2 photopass cards) or
2) hand them the photopass card you got from the first photographer at the main gate, they will scan it and now all your photos are on the same card so far.
Now you can link these photopass cards to your app on your phone at any time (they are good for 45 days) So you can do it while your waiting in a ride line or back at the hotel at night etc...
You can collect as many photopass cards as you want, but you will have to link each and everyone to your app/website.
Or you can try and remember to have the photographers scan the first one you collected at the beginning of the day. It doesn't matter really just your preference.
Now its the end of the day your back at your hotel and you decide you want to download all the photos from the day. You have already linked all your cards, ride photos, and any character dining photos. You can purchase the $39.99 photopass plus product right then, and download all photos to ur phone through the app or you can use the online website and download to your computer.
Or if you pre-purchased the $39.99 photopass plus product then once you have linked your photopass cards to your app or website you should see this:
View Photos in Your Gallery
If you have purchased photo downloads from your gallery, they are available to view, download and share..
Meaning you are ready to download because you already purchased the photopass + product.
I'm thinking you can even buy the $39.99 product after your trip as well (as long as your in the 45 day period) That is 45 days from when the picture is taken not 45 days from buying the photopass product or 45 days from linking to your account.
This is all just a guess though. I can't think of any other way they would be doing the new way though because the email I got after purchasing the photopass plus $39.99 product gave no information except you can download and share your images when your ready.