The machine ends where a human starts. Most sequences never build that ending, so leads circle forever and nobody ever calls them.
Not a score. A behaviour. Somebody who opened the pricing page twice and replied to a message is worth a call. Somebody who accumulated points by opening newsletters for a year is not, and a scoring model that cannot tell them apart is producing a number rather than a decision.
Most scoring models assign points that nobody ever validated: ten for an open, twenty for a click, fifty for a demo. The numbers feel precise and were guessed. That is fine as a first pass and dangerous once people start trusting the total.
A handover needs an owner, a deadline and a visible queue. An email to a shared inbox is not a handover, it is a hope. The most expensive failure in lifecycle marketing is a warm lead that arrived correctly and was never picked up.
Open rates measure a send. What you want is the share of people entering the sequence who reach the outcome, and how long it takes them. Those two numbers survive changes in tooling, inbox behaviour and image blocking.
Run the free domain check first, then tell us what it found. We come back with what we would fix first, at no cost.