If I am not terribly mistaken, with a (One Year) paid subscription, you are allowed to protect 'Up to 5 Devices' until your expiry date. Of course you can contact Customer Service 24\7 at no cost to verify. https://service.mcafee.com/webcenter/portal/cp/home/contact
Hello. Found McAfee Livesafe on sale, was wondering how many Licenses can be added to one account at once. For example, can I take 5 licenses and stack them so that my account has a balance of 5 years of protection?
If you mean add them on to each other consecutively, then you'd have to ask Customer Service about that.