It always has been a bit mysterious who is behind the POB community and the front-ends. There is another one which I think from @leprechaun because he promotes it in the comminity.

The owner of the community; @proofofbrainio was last active posting over a year ago.
I remember from the Discord channel that @scholaris was active on the project in the past, but got very busy.

But as you say, the community and the token will still exist after the domain name expires. From a abuse perspective it wouldn't be nice if the domain name would fall into wrong hands.

I have hardly used the proofofbrain front ends myself and about the POBphotocontest; I once started that to promote the community. I have a nice stake and generate some tokens which I can give away every week.
I will keep my contest running because I like the photocontest itself. When POB really is dead I might consider renaming my contest, but for now it's fine like this.