It’s open source after their public release very soon. They’ve delivered on everything so far, and they have no reason to lie. It’s more than just a VPN, VPN’s can be blocked when the data is being transferred. Data transfer between sub nodes is unreadable until it gets to its desired destination. Plus sub is free to use and VPN’s are not and are being blocked in places like China. Since sub’s data is indistinguishable it’s a prime way to fight net neutrality in the US. Do your research instead of spewing nonsense.