nobilior/walkeriana in sphagnum?

[ChrisFL]

I've noticed that a very popular way of growing nobilior and walkeriana in Japan, and perhaps other places.

This is a perfect example:

20”N“xNo01nobi_Don_Par01ŠJ‰Ô‹L˜^

So what are the advantages of this? For the species, it doesn't seem close to natural given the species life history. Also, if any of you are very familiar with the method, is there anything under the sphag? Styrofoam? Cork bark? How often are the plants watered? The spag changed out?

I used to grow these two species outside in Florida mounted, and they pretty much grew themselves, now I'm beginning to grow nobiliors again under artificial light in Texas, so I'm assessing this method.