You could just say that you don’t know what a reverse proxy is.

www.cloudflare.com/learning/cdn/…/reverse-proxy/

en.wikipedia.org/wiki/Reverse_proxy

Cloudflare was born out of Project Honey Pot.

www.projecthoneypot.org/about_us.php

www.cloudwards.net/what-is-cloudflare/

en.wikipedia.org/wiki/Cloudflare

But today UnSpam is far from the only IP blacklist tracer on the Internet.

www.whatismyip.com/ip-address-blacklist-check/

seon.io/resources/ip-blacklist/

And allowlist and blacklist is part of Cloudflare services.

developers.cloudflare.com/waf/…/ip-access-rules/

As for my personal situation, I have the receipts, but I have no desire to doxx myself today.