• conforms_to::[[Observation Form Contract]]
• has_epistemic_status::[[Retrospective Observation]]
• in_domain::[[Deep Context Architecture]]
• authored_by::[[Deep Context Community]]
• has_lifecycle::[[Seed Stage]]
• has_curation::[[Working Draft]]

Second-Cycle Contributors Are the Scarce Resource

In sustained knowledge communities, the bottleneck is not first-cycle contribution but second-cycle continuation. Roughly one in four first-cycle contributors continues to a second cycle, and the attrition at that transition is consistently high across reported cases. The first cycle produces volume; the second cycle produces sustainability, and the scarcity of the latter is what determines whether a community sustains.

Grounds

Two reconstructed records supply the evidence the claim rests on.

A recurring observation across sustained plural-contributor knowledge communities holds that approximately five of every twenty first-cycle contributors continue to a second cycle — a ~25% continuation rate, with most of the attrition concentrated at the first-to-second transition rather than across subsequent cycles. The observation recurs across multiple communities of comparable scale; it has served as a reality check against more optimistic sustainability narratives. The record's limit is that it is a summary across participant experience rather than a controlled measurement of any single community.

A four-tier cascade reported for a large-scale online community — approximately 300,000 members producing approximately 30,000 active users producing approximately 3,000 regular contributors producing approximately 30 sustained long-term contributors — was developed across years of direct community observation and is summarized in Allen's 2008 Power Laws post. The cascade's sharpest tier transition by absolute attrition is the 3,000-to-30 step (the second-to-long-term-contributor transition); the sharpest tier transition by contributor effort is the first-to-second transition, where contributors who produced once must decide whether the community is worth returning to. The two transitions sit on top of each other in the cascade and are distinct processes: the 30:1 compound scarcity across tiers reflects the structural distribution; the first-to-second drop-off reflects the specific decision point where a contributor's initial experience becomes a returning pattern or does not.

The record's limits are substantive. Both sources are anecdotal across participants' direct experience; no controlled study is available. The ~25% figure is approximate and community-specific; other communities may show substantially different continuation rates. The direction of the attrition — that the first-to-second transition is where most communities thin — is the durable finding across the reviewed cases. The specific ratio is not.

What Would Revise It

A sustained community reaching a second cycle with more than 50% of first-cycle contributors continuing would revise the claim's load-bearing direction. The revision would be strongest if the community were comparable in scale, domain, and platform friction to the cases currently on record; a small-scale or highly-filtered community that retains most first-cycle contributors does not revise the general pattern.

A measured case where first-cycle attrition is higher than second-cycle attrition — where more contributors drop off during their initial engagement than at the return decision — would also revise the claim. The current record places the first-to-second-cycle transition as the load-bearing attrition point; a counter-case would need to show first-cycle attrition dominating at a comparable community's scale.

A community adopting these conventions will produce data in this record's tail. If the community retains more than 50% of first-cycle contributors to a second cycle, the Observation's claim weakens as a general pattern. If it retains less than 25% — or fails to produce a measurable second cycle — the Observation's claim is corroborated at another data point.

Sources

• Allen, Christopher. Power Laws, 2008 — https://www.lifewithalacrity.com/article/power-laws/↗. Published article citing the four-tier cascade for a large-scale online community in abbreviated form.

Relations

• informs::[[The Second Cycle of Contribution Happens]]

  • The Aspiration targets reaching a second cycle; this Observation names the scarcity that makes the target load-bearing rather than assumed. Without the Observation, the second cycle reads as a natural progression; with it, the second cycle reads as a specific attrition point the practice must be designed to address.

• informed_by::[[Online Participation Follows Power-Law Distributions]]

  • This Observation is a specific tier-transition inside the general power-law distribution shape. The power-law Observation describes the overall contribution distribution; this Observation names the first-to-second-cycle transition as a specific drop-off within that distribution. The two compose: the power-law is the general shape; this is one of the shape's sharper attrition points.

• informed_by::[[Wikis Without Curation Drift Toward Write-Only]]

  • Communities that drift toward write-only exhibit this scarcity in a specific form: first-cycle contributions accumulate, but second-cycle continuation drops because readers cannot navigate the accumulation. The failure-mode Observation names the mechanism; this Observation names the measurable outcome.