Membership: The membership page houses details about which teams you are apart of. It will also show you who is paying for the VSS subscription and the status of your subscription.
You can also enter new credit card details along with your transaction history (if one exists).
Above you can see the current team that is subscribed to VSS. The 'inactive' team is still yet to be upgraded to VSS. You are easily able to upgrade by clicking upgrade to the right of the team and then entering the card details.
The 'Your Transactions' area shows which accounts (emails) are linked with VSS.