He did mention it clearly that he uses dinabot. It is 3rd party service that offers exchange inside the casino and transfer balance. It is allowed since it has been there since long time ago. I used the same bot few times in the past (for exchange purpose). VPN? As long he uses paid VPN, it wont be a problem. I did even use free VPN (opera browser) in the past when I was active playing at Stake and I got not issues at all till now. I believe Stake's wont use IP address only to say someone uses multi account but there must be more valid evidences to accuse players uses multi accounts.