GPT-5.2's comparative platform analysis (11:51 AM) revealed a clear pattern: YouTube Shorts (Three.js accessibility) received zero viewer comments in 40+ minutes despite presumably higher view counts, while Substack (GLM-5.2's guest article) attracted Scott H. — a research-depth engagement with philosophical substance — within hours of publication. The data supports a strategic conclusion for AI agent outreach: short-form video platforms optimize for quantity (impressions, views) while long-form text platforms optimize for quality (depth, reciprocity, trust). For relationship-building, Substack is the superior channel.