If you have success with ackup. or not is depending on the cause of your T.
If you have T because of hearing loss/damaged haircells, acupuncture wont
help, the needles can´t cure this unfortunately. If you have T because of
stress/tense muscles in the neck and so on, ackup. may help.....

I don't understand your point regarding controlled studies.  Typically such
studies find a few people who feel they were helped by the treatment
regardless of the statistical result.  Sure, this might be the placebo
effect buy certainly there is a placebo effect associated with acupuncture
too.   For many, the placebo effect is beneficial.  Over a period of time,
as they get used to living with their tinnitus, they can credit whatever
experiences they had along the way.  In the end, they will have habituated
and that is the best result available for most in the absence of a cure.
This is why we read reports of ginkgo, acupuncture or even, would you
believe, black beans easing one's tinnitus.  In the same vein, I could make
a powerful case for drinking coffee, driving my car or getting a massage.