Netflix also refuses to accept HE IPv6 traffic. This was 'fun' to find out when deploying IPv6 on my home network, and my TV could no longer stream from them.
Wow I did not know this. Tested this on HE's Looking Glass and you're right. Ridiculous!
People were abusing their 6to4 tunnel, which is why Netflix banned them.
It's a geo-fencing / DRM / regional licensing restrictions BS problem. HE is innocent, and Netflix probably doesn't have a choice* (though arguably what should matter is the bank account location of the buyer).
I remember seeing this, by accident, years and years ago before it was blocked. Took me longer than it should to realise why I was seeing US Netflix content, in the UK.