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I think it's possible that the company would "lose out," but that's not necessarily the case. If I have successfully convinced the algorithm that I am an expert on widget maintenance, my articles about widget maintenance will get a rankings boost. Then I leave the widget-maintenance industry. The algorithm still believes that I'm an expert in that niche ... for a while, at least. It's quite likely that the algorithm's confidence in my expertise will decay over time if I no longer engage with that niche. My AuthorRank may drop, and the content I authored may no longer get the AR rankings boost. How far the content would fall in the SERPs depends on how much it was relying on that one ranking factor.