My whole home network is numbered with static IPv6 addresses, assigned out of my TunnelBroker provided /64. Your service is fantastic - my current/former ISP (the landlord) only provided static IPv4 RFC 1918 addresses, and somehow your service worked 100% reliably with this type of arrangement. (the IPv4 that we shared was predictable and static, so I'm sure this helped).
The landlord provided a fantastic ISP for $40/mo - shared, but symmetric 100 Mbps fiber. Unfortunately, they are shutting this great service down, and I am now a (pseudo-involuntarily) customer of Comcast, with their horribly asymmetric 150/10 service.
I don't really feel like changing any of IPv6 address numbering any time soon. There's a possibility that in two months, I will be moving to another apartment, with an unknown new ISP with unknown IPv6 support.
So far, everything seems to be working fine, with a public Comcast IPv4, and using my existing HE IPv6 addresses. End to end seems to be working fine.
I know that a tunnel broker is a bit less than ideal compared to native IPv6 but I don't want to have to renumber unless I have to. I wanted to just ask and make sure that this is: A. supported, and B. allowed (given that the ISP has native IPv6).