The researchers compared the outcomes of guided self-directed (GSD) and pure self-directed (PSD) Internet-based gambling interventions. The researchers examined these outcomes over 24 months in 206 participants. The researchers also examined who is more likely to benefit from Internet-based gambling interventions. At the 24-month follow-up, 55 participants completed the follow-up questionnaires. Overall, 69% recovered or improved on their gambling symptoms. Both groups reported significant reductions in problem gambling symptoms, urges, frequency, spending, and psychological distress. Participants in the GSD group reported increased quality of life, as well as greater improvements in gambling urges and gambling frequency. Weekly internet use and being a woman were associated with better outcomes in the long term. These results support the use and benefits of Internet-based interventions for problem gambling.