Finds the videos your buyers are watching when they look for an answer ("best tool for", "how do I", reviews of your competitors) and leaves a genuinely useful comment from your own channel. Comments under the right video get read for years. Included on Scale.
A handful of comments a week per channel. Google's daily quota bounds the searches, which is fine: the point is the right video, not many videos.
Every agent publishes through the same gate: the warming lane, per-account and per-community caps, the 90/10 rule, community rules and your approval. The whole design is public.