Hey dman...your dead right ,in DWC you want the roots to search down & keep the rockwool cube only moist ect but that is for an oxypot DWC system...this doesn't use a drip supply but some others do ...like the freedom bucket above, & im guessing here but id say they probably use a much larger net pot & much more hydrotron & not a big res ect ...so some of the root system will always be in the larger net pot it needs a drip feed to keep these fed,while only the lower roots feed from the res ??.& it all kinda recirculates ??..
