Why AI developers are paying for expert-produced data
Public reporting and industry disclosures show AI developers increasingly paying for expert-produced reasoning data in domains like law, finance and science, as open-web data is exhausted.
The shift
For years, models trained on the open web. That supply is largely exhausted — Epoch AI estimates the stock of public human-generated text could be fully used between 2026 and 2032 (Epoch AI).
The next source is expert and operational data: how professionals actually work, decide and solve problems.
Public evidence
- Data-provider Handshake AI reported growing from zero to a roughly $1 billion run rate in about 15 months supplying expert data to frontier AI labs, paying out tens of millions per month to contributors (public interviews and coverage).
- Industry executives have publicly described labs as hungry for expert reasoning data in law, finance and physics.
What this means for partners
Expert reasoning lives inside companies — in tickets, calls, documents and workflows. Businesses with 50+ full-time employees at peak typically hold years of it. Introduce one to SourceX; if a deal closes and SourceX collects its fee, you can earn 25% of that fee, up to $100,000 per company.
- Step 1Share your linkSend your personal link to a company you know.
- Step 2Company appliesThe company applies itself at /apply.
- Step 3Buyer selects and paysThe buyer selects and pays for the data and SourceX receives its fee.
- Step 4You get your rewardYour share of SourceX fees becomes payable.
Free resources
- Business DSCR calculator — Debt service coverage from cash flow and loan terms.
- MCP ROI calculator — Estimate hours saved, implied savings and first-year ROI from MCP.
- Business exit readiness assessment — A preliminary exit readiness score and checklist for advisors.
- All free tools · MCP resource center
By SourceX Partnerships Team · Published 2026-10-09 · Updated 2026-10-09
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