This makes the most sense to me. They have their own chip and pin layer, which forwards the charge to the appropriate card account on the backend.
They probably don't have to worry about fraud, since the barrier to entry is $155 and they charge your card immediately.
The only thing that might be tricky is whether they get the 'card present' rates or not.
They clone the magnetic stripe part of a chip and pin card and then have their own chip and pin layer that they put on top.
In the UK the only reason you can't use magnetic stripe is because no shops allow it (if they do then they are completely reliable for the authenticity of that transaction) - if you could add a chip and pin layer on top of mag strip data then this might work (would still require a lot of fiddling and as far as I can see transactions would have to go via platc like google wallet).