Group 1 - The article highlights a rise in scams related to membership cards, particularly targeting consumers looking to save on membership fees [1][2] - Victims have reported significant financial losses, with one individual losing over 4,500 yuan and another losing more than 32,000 yuan due to fraudulent activities [2][4] - The scams typically involve creating a false sense of urgency and trust, leading victims to share sensitive information such as account details and passwords [3][4] Group 2 - The police in Xiamen have issued warnings about these scams, emphasizing the importance of not sharing personal information or trusting unknown individuals who request account verification or payment details [4] - The scams exploit the psychological tendency of consumers to seek convenience and cost savings, making them particularly effective [4]