The Lifetime Activation fee is only paid once. A previous member who attempts to rejoin will be required to pay a Reactivation Fee of 6 months dues. The software keeps track of this for you.
The Reactivation fee is designed to prevent people from signing up, canceling, signing up again.
To find more information on the Reactivation Fee: https://illumitrac.freshdesk.com/support/solutions/articles/44001684901-what-is-the-reactivation-fee-