Most are mining / herbalism cus those are just running around farming, to level jewelcrafting & Enchanting that would mean the bot have to disenchant / prospect / buy stuff on AH / craft things. It's a bit more complicated if even possible.
i made an enchanting profile, was doing good, but after around 2 hours of work, hb crashed and didnt save my profile, since then, my motivation was gone. -.-
or it's work bad like buy expensive mats etc...