King under the Mountain always rubbed me wrong. They hit right at the tail end of "wow. kickstarter is awesome" and right before people realized how many DF-like colony sims there actually were. And then their kickstarter survey, for a key with no add-ons, required an insane amount of personal information. I think they claimed it was for VAT but saw a few "ask a lawyer" threads that pointed out that was nonsense and could have been done with a checkbox.
And the super duper secret publisher right around the time interest was spiking because of DF-GUI was more than a bit sketchy
I dunno. I know that it is hell out there for indie devs (not so much in 2021/2022 but...) but all that combined with the game never feeling like more than a "unity school project" REALLY raises a massive number of red flags. Probably just a single kid in over their head and trying to act like a "real" studio but... yeah.
Still, good to see it was released as open source and here is hoping the fanbase that glommed onto this can carry it forward.