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I used to have those CJ, LK links on 302 Redirects. I changed them to cloaked links, which means they are no longer LEAKING. So on my site, I don't have any page with an external link.
I didn't do enough test comparing how SERP does on the same content with external links and without them. I hope it is not just one of those unique key phrases triggered the jump of traffics, or maybe just thanksgiving traffics.