The testing was done independently - I tested both affiliate and non-affiliate
services equally using the same methodology. Services like NordVPN, Surfshark,
ExpressVPN, Mullvad were all tested (mix of affiliate and non-affiliate).
PureVPN and IPVanish are mentioned because they passed all leak tests in my
testing. Proxy-Seller is mentioned because it represents the category of
"premium proxies" vs "free proxies" (which all failed).
The testing tool itself (examineip.com/vpn-leak-test) has zero affiliate links
it's completely free and independent.
