Optimism’s retroactive funding rounds, known as RetroPGF, are typically conducted once or twice per year. These rounds are planned in advance and involve community badgeholders voting on eligible contributors based on past work. The exact timing may vary, depending on governance votes and token availability. Each round refines criteria and voting processes, making participation more transparent over time. Round 2, for example, was held in early 2023, while subsequent rounds followed within 6–10 month intervals. The cadence may increase if the model proves scalable and well-received.