I reckon you are spot on about multiple contracts in each...

I reckon you are spot on about multiple contracts in each country. Try it out first and then apply across the board.

Just so many applications in the government sector.
Then you have the commercial sector too.

Bank cards are HUGE business and ideal, except there might be quite a few technical barriers to enabling ATM networks and the like to be able to read the Nexcode. Other than that, I can see it being applied on Visa/Mastercard debit and credit cards.