Thanks for browsing and purchasing a photo!
If you prefer, we can accept a credit card over the phone. Contact info
In a word, "safety." I fulfill your order, but the credit card is processed by Google. I never see your credit card number (nor do I really want to see it), so your card and identity are kept entirely safe.
If you are using Google Checkout for the first time, you only have to fill out a single page of information once to make your first purchase. After that, you just need to enter your Google Checkout login to make additional purchases at any store that uses Google Checkout. There is no need to re-enter your purchase information or create multiple usernames and passwords each time you buy.