KT tape can absolutely be helpful, but the ladies commenting on this thread are absolutely right in that its probably just a band aid for a bigger problem.
If you are not getting the desired attention/response from a PT, look into massage therapists in your area who specialize in Rolfing or myofascial work.
Fascia is connective tissue that's woven all through your muscles and joints and around your bones. When muscles are tight in a certain pattern over time its not just the muscles that get knotted up, this connective tissue gets stuck together too. If your shoulder is operating in this "stuck' state, then its unable to reap the full benefit of the exercises you do.
Ideally, find one of those specialists. If that is not an option, grab a tennis ball and google self myofascial release.
Here is a video that is a good example of what you would do with the tennis ball:
http://www.youtube.com/watch?v=3DNkA5N6bw0
What she is doing with that Bula ball is just as easily doable with a tennis ball. Explore that area like she is in the video, and feel where the tightness is. If you hit a spot that feels sensitive just lay on that spot and sink into it.
Myofascial release is uncomfortable, but it should be a "good hurt." Go SLOWLY and BREATHE. Keep in mind that it is counterproductive to hold your breath while doing these releases. So apply pressure to the edge of your discomfort and breathe and sink into these spots until the pain starts to subside. Once that spot releases, move on and see if there are other spots that need the same treatment. DO NOT keep massaging on the same spot for an extended period of time even if it feels good. You could end up causing bruising which is obviously not good.
Since you are a pole dancer, I know you have some pain tolerance! But don't push too hard and stretch out the area after working it.
Not sure exactly where in your rotator cuff you are hurting but should you want to Google further, here are some common culprits/muscles to google:
*Serratus anterior (this is often over looked because it *technically* isn't part of the rotator cuff, but it acts strongly on the scapula and I've found it to be a pretty common problem with polers)
*Subscapularis (sneaky muscle, but another common issue not just with polers but with almost everyone)
*Infraspinatus, teres minor, teres major
*Latissimus dorsi
On the KT tape, it can absolutely be helpful and I am a BIG fan, but it should just be part of the solution and not THE solution.
Best option is absolutely to find a licensed therapist in your area, but I understand this is not always an option so hope this helps.
Also: I'm not a doctor, but in my experience these are things have been helpful and since poling is SUCH a specific group of injuries and issues I like to share this info in case it helps someone