The number of clients who have access to your programs will count towards the limit of clients on your account. 

So if you have 15 clients in your "lifetime" program, and you have new clients who will need access to a different program, you will either need to delete some of your clients or upgrade to the next level of subscription to make room for the new clients.

We recommend that you don't give lifetime access to a program because clients rarely come back to it again after going through it once.