Why qualified replies beat messages sent as the agent metric
A marketing engineer cares about business results, not activity counts. Messages sent is activity. Qualified replies from real accounts is your signal. The whole point of an outbound agent is to generate pipeline and demand — and if the metric you're optimizing is volume, you'll build a system that looks busy but produces nothing. Tying the agent's success metric to downstream business outcomes is what separates a marketing engineer from someone who just automates busywork.
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