I read a really good blog that pointed out how much better it can be for gamification metrics like points, reputations and ranks to erode slowly over time.
Example:
If a member earned a high reputation 24 months ago by posting lots, getting ‘likes’ and best answers, and then goes quiet, their score should start to drop over time.
That way it’s clear to members that they’re no longer a voice of authority, a reliable source for help, and a valuable member, at least, not as much as they were 2 years before.
It rewards the consistent member, and it helps newbies rise to the top, above the legacy members.
Thoughts on this welcome!