SignalSage — Turn Reddit Rants into Validated Startup Ideas

The founder built a tool to surface startup-worthy signals from Reddit posts (e.g., "why isn't there a tool that does X") and has iterated to an MVP with 100+ early signups while filtering bots and duplicates. They are asking for advice on growing organically without breaking subreddit rules, which features best surface valuable ideas, and how to stay user-focused rather than feature-happy.