I wonder who can purchase and use this one?
Aerial photography amongst other uses. The issue is, that with this kind of payload, these drones only have a very short endurance, typically a few minutes. The link says 60 mins, but unless these guys have made the breakthrough of the century in battery technology, that's BS, unless empty (and I doubt even that). Btw, there are much bigger ones out there, used for aerial cinematography. However, these are flown by pros, normally in a controlled environment (e.g. film set). The problem are the plonkers who fly at 5k ft in the approach to LAX
