First, we define a global prefix key:
(general-create-definer global-definer
:keymaps 'override
:states '(insert emacs normal hybrid motion visual operator)
:prefix "SPC"
:non-normal-prefix "S-SPC")
No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.
Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.