Technically yes, and for the roughy toughy world of breweries and commercial distribution that's probably true, but for sedate hombrew use I can see them having a long and useful life :)
Ecokegs don't standup that well to reuse. You can reuse them, but the valves get knackered pretty quickly. You'd get 3-4 uses out of them at best.
The supplier will sell valves separately as they do inner PET bottles and spears.