1. The document discusses various business models for making money from Facebook apps, including selling ads, ecommerce, virtual gifts/credits, premium subscriptions, entertainment portals, affiliate programs, and sponsorships.
2. It emphasizes that apps need to be meaningful, social, useful, engaging, secure, respectful, transparent, clean, fast, and robust to comply with Facebook's guidelines.
3. Developers are encouraged to start simple, learn from users, and potentially partner with others to create successful Facebook apps.