I just upgraded another of my referrals a few minutes back.
That referral was super active. He has been my referral since March 2, 2011.
He hasn't missed a single say of clicking in the past 2 months.
Here are the number of days he didn't click in the following months.
April 2011 : 3
May 2011 : 0
June 2011 : 1
July 2011 : 2
Aug 2011 : 2
Sep 2011 : 2
Oct 2011 : 0
Nov 2011 : 0
Dec 2011 : 4
Jan 2012 : 0
Feb 2012 : 0
TOTAL : Just 14 days in 1 year.
Here are his stats.
------------------------------------------------------------------------------------------------------------------------------------
As for me, I have missed just 2 days of clicking ever since the new ClixSense layout in March last year