I admit it. I launched my fair share of grassroots advocacy email campaigns in the two decades I spent working as a professional advocate for national nonprofit organizations. Once a campaign was launched, my government affairs team would track success measures that reflected our ability to mobilize our supporters to take action. Metrics included click-through rates, open rates, and the number of letters sent.
Unfortunately, we didn't have a good way to measure how well our citizen advocates' emails were influencing decisions made by their Members of Congress.