Yes, American Express has its own bank called American Express National Bank, which was founded in 1989. It offers a range of banking services such as high-yield savings accounts, certificates of deposit (CD), as well as personal loans. Also, the bank is FDIC-insured, and you can use its services online.

The Delta SkyMiles® Blue American Express Card is primarily designed for personal travel purposes, so it may not provide a complete business travel experience. While it does offer certain travel perks and discounts, it is recommended to explore other options available on the AmEX-Delta card's menu to find a card that aligns better with your business travel needs. Just visit the American website to explore options.

To join the Delta SkyMiles program, you can visit the Delta Airlines website and use the "Join SkyMiles" option. This will take you to a page where you can fill out your personal information and create a SkyMiles account. Alternatively, you can also join the program by getting one of their cobranded credit cards. If you want to learn more about it, make sure to visit the Delta SkyMiles page.

There are a couple of ways to earn Delta SkyMiles with your Delta SkyMiles® Blue American Express Card. First, you can use your card for purchases at eligible Delta flights or Delta Vacations packages. Additionally, you can check out the credit card reward categories to maximize your rewards even further.