We are told that everyone will have to receive a mark on their right hand or forehead (the name of the beast or the number of his name) . . . so that no one could buy or sell unless he had the mark.

Don’t read more into this than what it says!  I don’t believe it specifically says that they will use the mark to buy or sell (although they may), so it may not be a debit card in the form of a chip.  It could be that the people that are following The Beast get a tattoo (that serves as their club membership card) and that, by being a member, they have access to goods, services and privileges that are only available to those who are members.   Those who aren’t members are denied.

Since they will want to differentiate between those who follow The Beast and those who don’t–and since those that don’t are not going to be willing to mark themselves as resistors–the only way they can do this is to demand that their followers take a mark.  Then, once able to identify who is ‘with them’ and who is not, manipulation (or punishment) can be targeted at those who oppose them.

The whole point is that everyone is expected to submit themselves to The Beast–to obey it, to give honor to it, to worship it.  My opinion is  ‘not being able to buy or sell without The Mark’  isn’t indicating the purpose of  The Mark, but is telling us what the punishment is for those who are in opposition to satan’s kingdom (as evidenced by their refusing to take the mark of membership).

What The Bible Says About ‘The Mark Of The Beast’