What's the advantage of a criminal sending me their seed phrase ?
Its a reverse scam technique. They first give you the private keys with some (fake) tokens in it but they require some gas fee to be transferred into your wallet, right? The moment you send few bnb or trx into that wallet for gas fee, they auto send it to the scammers' address (via a smart contract arranged).
If anyone shows you a btc balance and gives their keys especially on bsc/erc-20/trc-20 chains, its most likely a scam, dont get tricked.
PS: If they give you a seed in the form of recovery file, it most likely contains malware/trojan, delete them immediately!
So yes, I definitely see that's the case with the EVM chains.
I think the picture of the nemo wallet was faked. Dag