Actually top level domains are more censorable than just having lots of regular domains all over the place with different top level domains.

I think the DNS threat is overblown.

Firstly there are A LOT of Hive front ends. Every community has one.
Very difficult to shut them all down. It is something that would need to be done at government level by slow cumbersome legal process.

Secondly people can create a new domains and set up a new Hive front end very quickly.
Condensor is Open Source and quite easy to run.

All DNS does is convert a URL to an IP address.

For something you are using all the time like a Hive front end you can just use the IP address directly. You only need to record it once as a bookmark and DNS blocking won't work.

You can also change DNS server to one that doesn't censor.