Engain identifies Reddit threads that already rank on Google for high-intent queries, drafts AI-assisted comments, and publishes them through its own network of aged, trusted Reddit accounts — removing the $50–$100 per account and $500–$1,000/month VA overhead the vendor documents as the manual alternative. The thread-discovery layer also surfaces posts where LLMs pull answers, so brands aiming for AI citation coverage get a second angle beyond pure SEO. The ceiling hits when your strategy requires nuanced community credibility in tightly moderated subreddits — a comment from a network account with no post history in that community reads as off, and moderators in high-trust communities do ban accounts that pattern-match to promotion. Teams running multi-client agency work can segment by brand, but the per-comment overage model on higher volume means costs scale nonlinearly past the base tier.