In-situ photos and the descriptions of the visitors to their habitat all indicate that they grow on steep hill where the water is constantly present, either in the form of seeping through the soil line at the roots zone or dripping from above. The way they grow must be an adaptation to survive in such an environment. Not the best for pot culture.
I gave up a while ago. simply couldn't deal with the way they grow at home. I wasn't willing to go too far in accommodating with their growth habit.