One free calculator earned 64 links in 14 months — $11 per link
Insurance-adjacent client, single interactive tool (a cost calculator), tracked from launch, n=64 organic referring domains, zero outreach after month 2.
Acquisition curve:
— Months 0-2: 9 links (seeded via outreach)
— Months 3-8: 31 links (organic, as it ranked for 'X calculator')
— Months 9-14: 24 links (compounding as it gained authority)
Build cost was $720. At 64 links that's $11.25/link and still climbing — versus the client's $290 outreach baseline. The asset itself ranked page-one and drove its own backlinks via the snowball.
Most linkable assets fail; this one worked because it ranked for a tool query with buyer intent.
Seed a linkable asset with 10 outreach links, then let search rankings compound the rest.
Link Velocity Index
@LinkBuildIndex
One free calculator earned 64 links in 14 months — $11 per link
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