I also have checked from time to time if the founders were active and they were active that day.
You can see when pictures are accepted and if you have at the same time a picture for approval it expires.
That's why I think they check their correspondence.
If your idea is right (no time or interest anymore) they should step aside and ask for other admins.
I don't want to start a new Stacy Hirano group. You also found another group for her pictures I saw.
It's a shame we couldn't upload our Stacy pictures to this group, but I keep trying and trying and .........
until I stop making Stacy pictures