I do have 3 slots of apple music available. However, please note that they ask the organizer to enter the new members id and password when adding to family. Don't know if it has changed now but it was asked when I added a member a few years back.
Refer to my post.
I am interested for one slot, did you recently add anybody? Or will you like to do a mock trial for just pretending to add a fictional apple id and post the results here.
This will be helpful for interested parties as well as other future groups.