Most pipeline failures are self-inflicted
The common pattern is over-aggressive request pacing and poor session hygiene. Teams optimize for throughput, then get hit with challenge loops and profile fetch failures. Stable enrichment is about controlled velocity and consistent fingerprints, not spike traffic.
Proxy quality and session lifecycle are one system
We used rotating residential pools plus profile-session caps. Requests run through health checks and failover logic before they touch the core parser. That is how we kept enrichment progress stable at 70K profile scale without account bans.
Enrichment quality is won after extraction
Raw profile pulls still need entity matching, deduplication, and CRM-safe updates. The highest-risk bugs were duplicate merges and stale-title overwrites, so we enforced conservative match confidence and audit fields on every write.