They're also littering the London tube system with ads - there's definitely been a lottery win or a series A.
I'm not sure how much it adds to their bottom line for each sale, but my corp was using the Mullvad VPN addition to tailscale to do global testing by our developers.
IE; "is something blocked, do we detect GEOIP properly" etc;
We have neither won the lottery nor taken on outside investment. We've been growing for years, and we've reached a point where we can afford campaigns like this. It is an interesting experiment by our marketing team. Still, I think people on HN overestimate the cost of campaigns like this.
UK use of VPN’a outside the office/work environment is gonna skyrocket.