Democratic fund-raising emails that criticize the Koch brothers can triple the haul

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I can vouch for this.  Readership of posts about the Kochs really spikes above posts about normal political activities.
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Facts & Figures: The Koch Brothers
By The Editors, March 24, 2014

Slate’s David Weigel looked at fundraising emails from a Democratic campaign and, based on a non-scientific sample, found that criticizing the Koch brothers can triple the haul.

I’ve seen some numbers from fundraising emails from one campaign that were sent from roughly mid-January to mid-March, pretty bad news cycles for the party. Nineteen emails didn’t mention the Kochs. They raised, in total, $48,146.30, for an average of $2,534.02 per message. 

But five emails mentioned, in at least some way, the Koch brothers. Those asks raised $32,668.72, an average of $6,533.74 per email.

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