If it blocks your IP, wouldn’t everyone who came to your house get banned as long as they’re using your Wi-Fi?
I just checked their tool. With a brand-new private browsing window open, connected through a VPN, and a fair amount of blocking shit layered into my browser, it’s showing that I’m blocking ads and trackers, but that I still have a unique fingerprint. Even tools like canvas blocker aren’t preventing it. Running it through Tor, I have a non-unique fingerprint, but Reddit doesn’t play nicely with the Tor browser. Attempting to use different clean installs of browsers (Vivaldi, Brave, Edge, Chrome (incognito mode), etc.) all have me as unique. Fonts could def. do it; I have to have a ton installed on my workstation.