What is an "active member"?

[ShyGuyInChicago]

At the bottom of the forum home page we are told the number of active members on the forum. What is the criteria that makes a member active?

[Maverick]

Logging in within the past 60 days.

[Donkey]

/thread

But in seriousness, an active member in most people's eyes is someone who is usually posting around and is perceived as a "regular"