David Newton contributed to the OpenTTD/OpenTTD repository by delivering a targeted bug fix that addressed the miscalculation of cargo waiting time penalties at stations with poor ratings. Using C++ and his experience in game development, he corrected the penalty logic to ensure deterministic application, replacing the previous random generation approach. This change aligned the penalty system with established game rules, improving balance and predictability for players. David linked his work to issue #14712, provided review-ready code, and validated the fix to prevent regressions. His contribution demonstrated careful debugging, adherence to repository standards, and a focused approach to maintaining gameplay fairness.