wow, the private key with 10.28 eth can't be imported anywhere. The others work and are already being emptied. One way to lose your money for sure.

EDIT: the aforementioned wallet can also be found as the 0x00 wallet on the very first page. Interesting collision?

EDIT2: it's hardcoded https://github.com/SjorsO/keys-generator/blob/master/ethereu...

Why it cant be imported anywhere?

it's the maximum private key https://github.com/ethereum/go-ethereum/blob/master/crypto/c... - so the public key is actually just a example and not the real public key for that private key.