Hacker News Reader

I've seen the "checking your browser" on HN message quite a few times, especially when I use a VPN, and I'm pretty certain it's the CF one.

Maybe it's turned on selectively for high traffic / bot situations?

I just put in my own Cloudflare-enabled website and it came back negative as well.

FWIW, this site doesn't seem accurate. I used it against my site that is definitely using cloudflare and it incorrectly reported it as not :p