Direct Selling Market Size, Share & Industry Analysis By Product (Wellness Products [Nutritional Supplements, Weight Management, Herbal Products, and Personal Care & Cosmetics], Household Goods & Durables [Home Care & Cleaning Products, and Others], Apparel & Accessories, Services [Financial Services, Education Services, and Others], and Others), By Business Model (Single-level Marketing and Multi-level Marketing), By Method of Sale (Door-to-Door Selling, Group Selling, and Others), By End-User (Individual Consumers/Families and Commercial Buyers), and Regional Forecast, 2026-2034