How does this even work for mobile (the major selling point AFAICT)? A few minutes of research suggests that it's non-trivial to change my DNS server on iOS when using my cellular data connection.
A VPN to where? The VPS you control? Now we are back to giving you all of our data rather than just DNS queries... It's mind blowing to me that you expect people to pay a premium for the privilege of giving you all of their data.
Nothing personal, but I really hope this business fails fast and hard.