hmm… yeah… i would say if we consider a transit card “payment” then any closed payment system could be in the same category, and people were using the old VeriChip implants for paying for drinks at bars in like 2004… and plenty of school kids were using chips like the xNT to register with school lunch systems and vending machines… overall it’s a tough thing to define. As far as I’m concerned, there hasn’t yet been a payment implant… something sanctioned and legit and works with global payment networks.