Just had to blow off some steam about free vpns because I literally watched a campaign go down the drain yesterday. Was testing a new geo for a cpa offer and figured hey let me use one of those free vpn apps to check the lp load times from that region. Big mistake. The thing was injecting its own javascript and redirecting traffic. Saw my click costs spike and conversions drop to zero within hours. Lost about two grand before I caught it. The worst part is I should have known better after all these years but sometimes you get lazy. These free services are not free. They are selling your data or worse hijacking your sessions. I checked the network logs after and saw calls to ad domains that weren't mine. The protocol didn't even matter it was some proprietary thing they called 'lightning tunnel' which is probably just openvpn wrapped with their own tracking layer. My fault for not using a clean testing environment but man it's frustrating. So now I'm back to my old setup with a wireguard config on a cheap vps I control. Costs like five bucks a month and I know exactly what's running. If you're doing anything serious with traffic whether it's checking landing pages or managing accounts do not touch the free stuff. The hidden cost is way higher than a subscription. Ymmv but that's my two cents after a very expensive lesson.