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Five most common causes of low-yield or noisy lead-discovery runs — and how to fix each one.
Most low-yield runs have one of five causes. Here's the diagnostic flow.
Symptom: Total yield < 10 candidates, ICP router classified the prompt as mixed, sources include linkedin, crunchbase, web but no high-yield source like github, osm, or news-rss.
Fix: Add specifics:
Symptom: Total yield < 20 candidates for an SMB-local prompt; OSM dominates but contributes only ~10-20 entries.
Fix: Some geographies have thinner OSM coverage. Try:
Symptom: LinkedIn / Crunchbase / Web hunters return 0; OSM and News-RSS work fine. Conductor logs include pool_http_502 or searxng_circuit_open.
Fix: This is transient — SERPs (DDG / Bing) periodically rate-limit our outbound IPs. Wait 15-30 minutes and re-run. Or accept that GitHub + OSM + Directory carried the run, which is often the higher-quality subset anyway.
Symptom: SwarmActivityFeed banner shows "shape=tech-founder" but you wanted SMB-local; or vice versa.
Fix: Reword the prompt to bias the router:
clinic, shop, firm, agency, studio).SaaS, fintech, B2B software).tender, govt, public sector.Symptom: Candidates with name: "LinkedIn Profile" or company: "Self-employed" slip through.
Fix: This was a known parser issue fixed in May 2026. If you still see these, the candidate was probably created before the fix — they'll be filtered next swarm. If you see them in a fresh swarm, please raise a bug — the parsers should reject them outright now.
Before you blame the system, sanity-check:
scraping after 5 minutes, the swarm is still in progress. Wait.If your team is running 10+ swarms a week and consistently getting < 30% of expected yield for known-good prompts (e.g. "Dental clinics in Berlin" should yield 80+), open a support ticket. The most common root causes for sustained underperformance are:
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Writing Great Lead-Discovery Prompts
The 3-part formula for great prompts (Role + Industry + Geography), examples by ICP shape, common mistakes, and iteration tips.
Understanding Your Sources
What each of the 8 sources is best at, when the ICP router picks it, what it cannot do, and typical per-query yield numbers.
Lead Discovery: How it Works
How the agent swarm finds 100s-1000s of qualified leads from any country in 60-180 seconds. ICP Router, Source Discovery, and Cascade Resolver explained.