Ever noticed how Rev 13:17 is always left out of their explanation of 666. They apply the number to politics like the image that Nebuchadnezzar set up and not pledging allegiance. But they never really explain Rev 13:17 which is specific in saying you wont be able to buy or sell:-
(Revelation 13:17) . . .and that nobody might be able to buy or sell except a person having the mark, the name of the wild beast or the number of its name. . .