I did as well. I think that over time everyone will. But a “billing request” does not mean paying. I have a very busy site. I signed up for a billing account some months ago. I receive an invoice every month – and every month it is for zero dollars. It is just a process, to catch those people who have taken unfair advantage of a free service. It would be extremely rare for a family history site to have enough visitors using Google Maps to trigger a payment. The free allowance is very large. Some people will, I am sure, be worried about giving credit card details to Google, but it is not necessary to worry.