Membership Plugin - subscription for group/institute

Hi,

A. I need to create a subscription option for a group. When they register as a member and buy a subscription I want it to automatically create x number (say 10 for example) of users or allow the user signing up to create x amount of users for the other people in the group.

B. Is there some way to track who is using the subscription? Or how many users there are?

If these are not options is there someone on your team who can help with customizing this?

Thank you,
Eliana