If the user wants to use it in the future, then I'm sure a simple login once in a while is enough to deem them as "active". However, if they haven't shown any

If the user wants to use it in the future, then I'm sure a simple login once in a while is enough to deem them as "active". However, if they haven't shown any sign of life for 10+ years I believe it's time to move to someone who will be an active member of the GitHub community.