ABSTRACT: Online gambling has rapidly evolved into a complex public mental health concern driven by persuasive digital architecture, expansive accessibility, and targeted promotional strategies. This qualitative study examined how young online gamblers aged 21 to 30 and addiction-focused therapists understood the cyberpsychological mechanisms and public health risks that accelerate the transition from recreational betting to problematic gambling. The analysis revealed that online gambling operators strategically employed inducements such as “risk-free” bets, bonus credits, and algorithmically personalized promotions that fostered illusory perceptions of control while activating neural reward pathways implicated in compulsive behavior. Participants described how the constant availability, anonymity, and frictionless design of digital platforms facilitated emotional escape, reinforced avoidance-based coping, and masked escalating harm until substantial financial, psychological, and relational consequences had emerged. Therapists emphasized the compounding impact of developmental vulnerabilities, including impulsivity, depressive symptoms, and peer influence, which interacted with cyberpsychological reinforcement schedules to produce rapid-onset addiction trajectories. Regulatory inconsistencies across jurisdictions further intensified risk by enabling aggressive cross-border marketing and inadequate consumer protections. Through thematic analysis of semi-structured interviews with five young gamblers and five clinicians, the study illuminated how technological affordances, emotional dysregulation, and sociocultural normalization converge to heighten population-level vulnerability. Findings underscore an urgent need for comprehensive prevention, policy reform, and treatment innovation grounded in behavioral science and public health principles. The study contributes new empirical evidence to guide interventions that address both the psychological mechanisms and the public health structural determinants of online gambling addiction. KEYWORDS: flow theory, on-line sports betting, online gambling, cyberpsychology, behavioral addiction, mental health, public health, operant conditioning, financial mismanagement