I would of thought the real money is in the juice, all constituent parts of juice are very cheap and I imagine that's where the real profits come from. If they make a device that's any good and interoperability is required I imagine someone will machine adaptors for whatever is required.
As for trust, well I'll trust a company that currently produces a much safer product than BT's known killer. Also remember nearly all atomizers come from China and contain primer juice - you have to remember that DK wouldn't put their whole companies reputation at risk by producing sub-standard or poisonous liquid for a small saving on what is a cheap to produce product, it's not like we don't have non-Chinese juice should any scandal arise.
As for trust, well I'll trust a company that currently produces a much safer product than BT's known killer. Also remember nearly all atomizers come from China and contain primer juice - you have to remember that DK wouldn't put their whole companies reputation at risk by producing sub-standard or poisonous liquid for a small saving on what is a cheap to produce product, it's not like we don't have non-Chinese juice should any scandal arise.