thanks for sharing this idea! I think it is a good and nice idea - actually something we already tried in the Netherlands as a local event in the historical city Delft. We collaborated there with the local GLAM center and a local newspaper - but unfortunately we dindt have any submissions for this subcontest. It seems the threshold was too high and the concept was a bit too complicated for people to grasp.
Now I do not remember the details, but I remember that I considered taking part - but was put off because the requirement was not only to take pictures, which for me was actually pretty easy since I live in Delft, but also to write something which was beyond my language abilities. I hope the contest will make it better this year.
Best regards Yaroslav