My theory is that if you spend hours and hours trying to save an occasional $7 then it is not a good move. Out of thousands of names registered I can probably count on two hands the number of mis-types I have had. Never step over a dollar to save a dime. Other people may wish to drive 30 miles to save ten cents on gas, but I prefer not to even know the price of gas.
If you have a sheet of names and time is not of the essence when registering them, then all you have to do is enter the name....match it up with the list, and then press send. It is pretty easy. I can't see how anyone could make more than a few mistakes per year.