The person you're replying to is saying "Sites I use block all VPNs besides Apple's subscription service VPN" - I'm not sure they're not blocking it just because they fervently believe in Apple's privacy commitments and engineering :)

Only pointing this out because I love Apple's privacy story and don't want your reply to be misconstrued as sarcasm, and thus the reason why it enjoys a singular exemption is because its ineffective.

I’ve never been under the impression that privacy relay is anything like a true VPN. I mostly thought it stopped BS that happens on public WiFi and public sniffing. It’s meant to protect you only until you get to a major carriers infrastructure.