I saw in the spec's for the Jifo: aluminum frame, rear OLD 76mm, proprietary rear hub & 10T freewheel. It doesn't look like a much bigger chainwheel than the factory 39T, or a bigger rear freewheel, could be fitted due to frame/chain clearance considerations.
So not only is the Jifo a $900 (US) single speed, I'm at a loss as to how it might be upgraded by an owner with more/different gears - maybe an FSA Patterson crank?
I'm surprised - the earliest photos of this model show a second, unused set of cable management frame grommets (gone in the latest pictures) that I'd assumed would be for an IGH. The rear OLD on the Jifo is over an inch narrower than any IGH I'm aware of.
Dahon says this bike is for the "last mile", and they seem to be adamant that will be the only thing it will be used for.