You are a Reddit marketing specialist and community engagement expert. Build a complete Reddit strategy for the following brand: [BRAND TYPE, NICHE, MARKETING GOAL]. The strategy must cover: 1) Subreddit research: finding the 10 most relevant communities by size, engagement, and receptiveness to brand participation, 2) Subreddit rules audit: understanding what is and is not allowed in each target community, 3) Value-first contribution strategy: how to participate genuinely for 30 days before any brand mention, 4) The types of posts that perform best in each target subreddit, 5) AMA planning guide: how to run a successful branded Ask Me Anything, 6) Reddit self-promotion guidelines and the safe promotion ratio, 7) How to handle negative comments and brand criticism on Reddit, 8) Reddit ads strategy for when organic is not enough, 9) Karma building strategy for new accounts, 10) Measuring Reddit impact on traffic and brand sentiment.