This guide covers multi-level marketing and business opportunity sales from structural analysis through disclosure, claims, participant status, litigation, and compliance program design. It begins with the doctrinal test that separates a lawful program from a pyramid — a payment for the right to participate and compensation unrelated to sales to ultimate users — and works through the internal consumption and inventory loading refinements that decide cases. It sets out the enforcement framework and the remedial changes that have pushed enforcement toward rule violations and State action. It treats the business opportunity disclosure rule and the franchise rule as the exposures operators most often fail to analyze, together with State registration and the rescission right that follows a registration failure. It covers earnings claims in detail, including what counts as one, why disclaimers do not cure the net impression, and how to read an income disclosure statement. Separate parts address endorsement and social media compliance, participant classification and tax treatment, private litigation theories including racketeering and securities analysis, adjacent categories, and the elements of a compliant program.