In the Membership FAQ it says that being an Ubuntu Member is a lifelong thing. But it doesn't mention what happens when somebody doesn't renew the subscription on launchpad.
So, if 2 years since my membership passed, I miss the email, forget about it or don't want to renew the subscription at that time, and then I want to renew my membership, what is the process?
Here is the rejoin process documented: https://wiki.ubuntu.com/Membership/Rejoining