Was trying to buy a book online, fascinate by the whole ordering process. Some ui patterns are design to assist the consumer while others are carefully crafted to encourage more spending.
1. Upon resetting the password, the system will delete all stored addresses and credit cards information. While this may seem troublesome, but it does prevent information leaking if your account was ever breached.
2. Separation of credit card and Paypal payment method. Far more easier and safer. At least your credit card information is stored in just one location instead of multiple sites.
3. Encourage more spending and creating good feeling when you can support your favourite charity for every online purchase. Another method to encourage more purchasing.
4. Similarly to (3), notice how the keywords free and save were being used to encourage more purchasing.