Granted, having it on a ring is easier even than taking your whole wallet out, but I’d rather do that than have to remember to put on your (ugly) ring every day. I guarantee that if I needed something like this regularly, I would forget it frequently unless I kept it on me at all times anyway, which is why putting this in a piece of jewelry or something like that doesn’t make sense.

But… if you’re the type of person who can remember things like that easily, then it’s a cool idea :)

But I can verify that straight acetone works on Orca cards; the chip and antenna from one of mine is now carefully re-wound and taped inside my phone.

http://www.octopus.com.hk/get-your-octopus/choose-your-octopus/en/index.html 

personally, I would gladly cut up several 1,000 of these Oyster cards:

That said there’s a big market for card holders.

This ring is naff though, tha magic wand I saw a while back was a great conversion :)

As long as they refrain from having a ‘loveable’ cartoon character named ‘Wampum the payment Oyster’, they might even get away with it.

I’m sure that it is making whoever did the math cry; but real-world RFID systems have some slack built into them, because people expect them to work under sub-optimal conditions. You can get away with a bit.

Given that paying a fee for permanent use of one certainly smells like a ‘sale’, I wouldn’t want to be the guy who actually litigates that legalese(and, in any case, the unit value of an RFID card of that nature is about the same as a lukewarm cup of coffee, so we aren’t talking major damages here); but they certainly do their best to suggest that any interaction with the card not intended by the issuer will cause your spleen to fill with barristers.