Membership io helps creators, coaches, educators, and community businesses package courses, media libraries, and member content behind a subscription experience. It fits business audiences focused on monetizing expertise, running paid education, or moving customers from ad hoc file sharing into a structured member portal. Its affiliate program offers anyone can apply to the affiliate program, receive a link, and earn 30% recurring commission on Start, Grow, and Scale plan referrals for as long as customers remain subscribed. It also mentions affiliate manager support and real-time reporting.