I'm looking at doing some automation of groups in AGOL and one of the things I'd like to do is make a note for each group member of how they were added, etc. (And other things, too, but that's my current need).
With that in mind, I would love another property added to group members that would just be a text field for freeform notes, specific to each user in each group. (Meaning that my note in Group A is not the same as the note in Group B).