Decay-Adjusted Contact Value

Contact data is a depreciating asset, not a one-time purchase. Every enriched record carries an implicit half-life: job titles turn over, direct dials get reassigned, and technographic flags go stale as clients migrate stacks. Agencies that price enrichment as a fixed line item absorb the decay cost themselves; agencies that treat it as a recurring maintenance cycle can defend margin. The practical move is to model a refresh cadence per data field before quoting a retainer. A verified mobile number may hold for six to nine months, while a job title can shift inside a quarter. Cleanlist reports 98% email accuracy and 85% direct dial rates at the point of enrichment, but those figures describe a snapshot, not a permanent state. Pairing a multi-provider waterfall (Clay, Cognism, Wiza) with a scheduled re-verification pass keeps the decay curve flat instead of letting it compound against campaign performance.