I think by “straight forward setup”they are referring to the setup they used to monitor the traffic for leaks as follows:
We test for VPN kill switch leaks using a straightforward setup. We run the VPN on a Windows 11 computer, which is plugged into a network switch. The switch is configured to mirror all traffic from that port to another port which goes into a Linux computer. That computer runs Wireshark and monitors all the traffic, effectively capturing everything from the Windows computer.
Not clickbait, and to my non-expert view it is indeed good faith.
They bothered to adjust their leak definition per community feedback - this I bought and going to subscribe right now.
Their registration doesn’t work though.