For the life of me, I just can't wrap my head around what actual problem this thing solves.
Can't say that I know, but I have ideas...
In motorcycle road racing, we use forks. The forks have springs in them. If one takes a spring and just pushes on it with enough force to really reduce its free length, it doesn't just compress neatly...it wants to push away from the direction of travel from the load that is being put on it.
A fork tube can receive direct contact with a fork spring as a result. And that contact is friction.
A manufacture of some aftermarket suspension components developed a cartridge replacement (most newer, higher performing motorcycles have a full length unit that operates the various ranges of dampening and retains the fork spring)that used a fork spring that was smaller in diameter compared to OEM and other aftermarket manufacturers. One was the elimination of the friction against the fork tube. Some of that was achieved by how the spring was kept captive at the top and the bottom of the spring.
I look at the JP thing, and that's what I'm thinking that they are doing...but I don't know for certain.