Matched betting is a popular but controversial strategy where individuals exploit promotional bonuses from online gambling sites to secure risk-free profits, often through techniques like gnoming and multi-accounting. Gnoming involves using the identities of friends or family members to create new accounts and collect additional bonuses, complicating detection efforts due to the use of genuine identity information. This practice, while not always illegal, typically violates terms of service and poses a significant challenge for gambling companies trying to prevent fraud without deterring legitimate customers. Advanced fraud detection measures such as device intelligence and browser fingerprinting are recommended to identify and prevent matched betting and gnoming by tracking device usage and behavioral patterns, allowing companies to differentiate between fraudulent activities and legitimate gameplay without adding friction to the customer experience. These tools provide long-term visibility and high accuracy, offering a strategic advantage in curbing sophisticated fraud tactics while maintaining customer satisfaction.