The above image is all us folk in the UK see when you do, and if we try to use a VPN + incognito, we get this:
403 means forbidden, so the message is disingenuous.
They must have put some effort into block lists for VPN servers. Even if it works for some of us, it’s not worth it.
For more information on this, see this article: https://www.bbc.com/news/articles/c4gzxv5gy3qo
My VPN is custom and they block me. How can they tell the traffic is being routed via VPN? I should know this, can’t quite remember how that works.
Where are you hosting your custom VPN? I assume some kind of server rented from a data center. Which means your IP address will be from a data center, not a residential or mobile address.
Because up address spaces of known hosting providers and VPN providers is known.