Just to keep it simple..
1. Is your credit card stored on Google, so that I do not need to enter it every time after I make my first purchase?
2. Is there an invoice for purchases?
3. Is your credit card charged after the initial 24 hours for each application downloaded.. (Say, 10 charges on my credit card for $1.99 instead of one charge for $19.99)
4. Can I use my US account to pay for programs such as "Beautiful Widget" which is from another region?
Thank you for all of your answers,