You should make sure that your affiliate links are working. Check them out every two months or so. Recently I found that my old Chitika affiliate referral link https://chitika.com/mm_overview.php?refid=dvdann takes my readers to a page that no longer exists on the Chitika website. My new referral link is https://chitika.com/publishers.php?refid=dvdann

I may have missed Chitika's announcement stating that the referral links were changing. I don't know. And maybe the old dysfunctional referral link still correctly attributes new affiliates (ad publishers) to me when they navigate to the sign up page, but I'm sure that the correct referral page, https://chitika.com/publishers.php?refid=dvdann, is more effective.