Yeah it's not about 'not being able to deliver', these guys are pure scammers. They had a site "adena.club" before, but when they scammed enough people they just changed their URL. I'm pretty sure they don't have any adena at all. They just show you fake references, take money and when they recieve the money they block you - I sent them 20$, obviously didn't recieve anything, and when I came to ask where my money is, they just tried to say "they didn't recieve the money" or that "their paypal account got blocked" etc. After a while they just put me on block.
Generally speaking: if the price is too good to be real, it's probably not real.