I'm sure many of you have seen this image floating around online at some point.
It seems a rather neat idea, though I'd be worried about any sort of accident, or even potential fight, ripping that piercing right out.
But, what if the lenses attached with magnets instead?...
My use case was getting into the building at work because I kept losing my tag. One quick jab, copying the ID with a Proxmark3 and problem solved. Then I installed a NFC lock at home - that I upgraded to a RFID floor mat - so I have a NFC transponder implanted in my hand, and a RFID one in my foot. Super useful to unlock the door with your arms full of groceries ๐ Then it kind of snowballed from there and it became a bit of a hobby. But my rule is, I never implant stuff that I don't plan to use everyday to make my life easier, so all my implants are used all the time.