There are several benefits of requiring Facebook login, including:

1. Optimized user experience: One-click login, no need to verify your email or remember another password, and seamless experience of Oxigen's Facebook-integrated content and community features.

2. Enhanced security: Facebook login is protected by Facebook's enhanced security practices and policies, which are among the best in the world.

3. Fraud prevention and Oxigen's exceptional pricing: Requiring Facebook login makes it very difficult for fraudsters to breach Oxigen's account security and anti-fraud measures, which is critical to Oxigen's ability to provide the highest true exchange rate on the market for payments and money transfers.