The old outbound model is a static list worked in order. Signal-based prospecting flips it: the ICP defines who could buy, signals decide who to contact this week, and the message is built around the signal. Volume drops, reply rate climbs, and the list stops going stale.
It needs three pieces: a clean ICP, one or two signal sources you trust, and a sequence per signal. The club's first course, Signal-driven outbound, builds exactly that, from one signal to one running campaign.