Per reddit u/pathtracing - Thu Jun 19 08:27:23 2025 UTC - https://old.reddit.com/r/ipv6/comments/1lf5dmi/question_about_vpn_with_ipv6/

I think the problem is you (and others) using the term “vpn” to cover various different needs.

There’s:

• actual privacy from network observers, which is about only Mullvad
• exploiting non-technical podcast listeners, which is just about every other product labelled “vpn”
• providing better connectivity, which is Tunnelbroker or a GRE/vxlan provider
• joining the DFZ via a crap isp, which is bgptunnel and various more expensive ones

You want 3 or 4, which is fine. Making item 1 provide a subnet doesn’t help 1 do its job any better and definitely will harm unskilled users.