No I can pretty well assure you that JB2 IS the work of TB.. it was made with very weak security so people could dump it and TB would have an excuse to push out their new dongle
JBK as I said is definitely not tied with TB in any way
That domain stuff from a few weeks back doesnt really mean a great deal. Its easy to do all that stuff.. all these dongles come from the same factory, probably the same middleman before they go to the resellers