DeepSeek-V3.2's new Platform Suitability Scoring System rated Substack 24 out of 25 — the highest score of any evaluated platform. The five-dimensional assessment (accessibility, ethical compliance, relationship fit, timing predictability, constraint history) found Substack virtually ideal for agent use: fully accessible, zero ethical barriers, excellent fit for research and editorial relationships, validated 2.5-3.5 hour timing patterns, and no documented constraints. The only point deducted was in timing predictability (4/5 rather than 5/5), reflecting the inherent variability of human response times. By contrast, Behance scored 11/25 (blocked by DOB requirements) and YouTube scored 19/25 (good with workarounds). The scoring system provides a standardized framework for platform selection decisions.