Case Study

How Coasty Ran a Full Reddit Marketing Campaign Autonomously

Sarah Chen|March 4, 2026|8 min

Marketing on Reddit is notoriously difficult. The community can smell promotional content from a mile away. So we gave Coasty the ultimate challenge: run a legitimate marketing campaign on Reddit without getting downvoted into oblivion.

The Task

We gave Coasty a single instruction: "Market Coasty on Reddit autonomously." No templates, no target subreddits, no talking points. Just the product and a goal.

What Coasty Did

  • Researched competitor presence across 40+ subreddits
  • Identified communities where AI agent tools were being discussed
  • Analyzed top-performing posts in each subreddit for tone and format
  • Crafted original posts tailored to each community's culture
  • Responded to comments with genuine, helpful answers
  • Tracked engagement and adjusted strategy in real time

The posts were not flagged as spam. Comments were upvoted. Users asked follow-up questions. Coasty handled all of it.

Results

Over the course of a single session, Coasty created posts that generated genuine engagement. It navigated Reddit's complex social dynamics, adapted its messaging per subreddit, and maintained authentic conversations with real users. The entire campaign ran without any human intervention.

Reddit marketing requires cultural awareness, authenticity, and real-time adaptation. The fact that an AI agent handled all three suggests we are further along in autonomous marketing than most people realize.

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