No.  You only pay the purchase price for your Lifetime Travel Membership. 

The Lifetime Travel Memberships are always in a state of constant improvement.  New travel vendors and new destinations are always being added to the membership, while vendors that do not hold up to the high standards of the membership are removed.  Once the Lifetime Travel Membership is purchased, members are entitled to all updates and additions at NO ADDITIONAL COST.  When purchasing your Lifetime Travel Membership, you will be asked during the check-out process if you would like to receive product updates via e-mail, and your membership materials will include instructions for receiving the product updates as they are announced and released.