Working method means chances to win is high so they certainly profit on their strategy. Sports betting is not entirely base on luck because knowledge and experience can contribute to maximize the chance to win. But when you say a woking method how accurate it is? Analysis can be wrong at times, and if it's really working then why share it to others if you can have it alone and make yourself rich? Because it's just their way to take advantage others for believing so.

Thus, it's better to have our own analysis and knowledge about the specific game rather than relying to others claiming they have working strategy.