A wheel like that has lots of rotational momentum. Though I haven’t spent a lot of time riding one, my impression was that they’re not much good for tricks. I managed to idle and bunny hop a little, but it was heavy and the top of the fork was so wide that it poked my calves. A bike shop owner offered me one for what was supposed to be a discounted price- $200. The fat tire is supposed to be good for riding on sand, I think I read somewhere, though when I told the bike shop owner that, he just roared with laughter.
Here’s a thread about “monsters.” It doesn’t say much beyond what you’ve already figured out, though. Definitely NOT a street unicycle.