“And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name...”
That was my first thought, as well.
it’ll be easier with technology.
“Residents can only shop at Bicentenario on certain days, which are decided by the last numbers on their ID cards. Once in line, people agreed on the wrist number system to avoid trouble, but the shop also assigns them paper numbers.”
Based on their ID cards.
First, although not deployed in a sophisticated manner this instance, yet we can now see how and why such a personal numeric system will likely be used.
Second, it now seems pretty clear that there will be some world-wide collapse requiring this personal numeric system. It seems likely that it could be an economic collapse, but it could also be an agricultural collapse due to devastation of war. Recall, that in the day a loaf of bread will cost a day's wages.
So, it seems that we can now see how people will willingly apply the mark to themselves and why. The question is when.
GMTA