how seized by FBI and they came back and they refund?
that's impossible!
Because it wasn't actually the servers that were taken, but rather just the domain, which is usually registered somewhere where the US have some sort of jurisdiction.
It's a setback for sure, but nothing compared to the FBI actually taking their servers and thus their funds.
I'm wondering if there are any domains that are so to speak "unseizable". Apart from .onion ones, i don't think there are?
Nope, everything besides .onion could be seized. It depends great deal on legislation in each particular country but in general you can't have such domain that is fully protected if you use it for illegal activities.
In this case FBI has seized only the domain but that doesn't mean they will stop on that. Servers could be another step, so I wouldn't count that this game is over.
