Global Niche Influencer Marketing Market Size, Share and Analysis Report By Platform (Instagram & Facebook, YouTube, TikTok, Twitch & Gaming Platforms, Blogs & Niche Forums, Others), By Niche Category (Gaming & Esports, Beauty & Skincare, Health, Fitness & Wellness, Sustainable Living & Eco-products, DIY, Crafts & Specific Hobbies, Others), By Campaign Type (Brand Awareness & Content Creation, Affiliate Marketing & Performance, Product Launches & Reviews, Community Building & Engagement, Others), By End-User Industry (Direct-to-Consumer (DTC) Brands, Specialty Retail & E-commerce, Lifestyle & Consumer Packaged Goods, Gaming & Technology, Others), By Regional Analysis, Global Trends and Opportunity, Future Outlook By 2025-2035