Research and produce a list of the top 20 clickbank money making niches with 3-5 keywords, 3-5 relevant long tail keywords, and 3-5 high profit products for each niche. . Organize keywords, long tail keywords, top 20 niches, and recommended niche products by search volume/competition metrics, including average earnings, popularity index, competition levels and, if available, cost effective traffic building methods. Research links may include Clickbank Marketplace statistics top performing niches 2024-2025 gravity score spreasdsheet, authority hacker clickbank niche research case study, spencer haws niche pursuits clickbank affiliate income report, health and fitness clickbank affiliate keywords research spreadsheet, and clickbank marketplace category structure and top products gravity scores. The final output to include a summary report of results and recommendations, along with specified spreadsheet columns to make clear decisions.