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In practice
Backlinks are not a one-off purchase; they are a state that can end. A page gets rewritten and your citation vanishes. A site changes owners, its CMS migration drops URLs, or the domain simply lapses. Editorials get refreshed and links that existed in 2024 are gone by 2026 with no notification to anybody. Measured this way, every link is rented with an unknown term, and a campaign that reports “X links delivered” without measuring how many of them are still live at month six is reporting fiction.
Churn is the management number behind rot: new links in, dead links out, per period. Healthy programmes show a rising net referring-domain line despite constant attrition; unhealthy ones quietly shrink because nobody was counting. The concrete defence is monitoring cadence — checking placements against the live URLs, not just against an index tool that may itself lag. Husky Hamster monitors every delivered link for 12 months and replaces removed ones free, which is the minimum an agency should put in writing rather than mention in a sales call.
The GEO angle is real but slow: AI answer engines re-crawl their sources, so a placement that decays can silently disappear from the retrieval pools models cite months after the SERP forgot it. Watch the same pages in both systems. And when rot is discovered, it becomes a workflow question — who drafts the replacement outreach and how fast does it ship — not a reason to renegotiate the entire campaign.
See also: Placement lifetime, Backlink monitoring and link tracking, Replacement workflow when links drop.
Related service: Link insertions.
