Sorry about the late reply -- only just noticed the question.
I have toob. They do not use CGNAT -- thank goodness. You get a public IP address.
They don't provide static IP addresses, but they do give a sticky dynamic address. [Mine's been stable despite reboots, and the two recent overnight network maintenance events].
As for IPv6 -- not sure, as I haven't bothered to set up my system to use it.
As for tech questions in general, I found sending an email to
[email protected] worked.
From my experience of their service -- it is scarily fast.
I'm not used to Linux Install images appearing so quickly.
all the best
Lawrence