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Can we track the positive effects of an off-topic question?

In response to this question, is there a way in which we can work out the positive effects on traffic and questions following this?

I've noticed a few good questions from users with referal bonuses but otherwise new to workplace, and assume they've been directed as that question came under the 'hot questions' tab in the stackexchange dropdown, but is there a way of confirming what I think?