You can also just acknowledge that we don't know what they did (and that is because they chose not to tell us). Apparently, until not so long ago Jev would spell out its identity as Q-w-e-n if asked, so we might as well assume that what they did is at least similar to what this blog poster did (who chose to tell us).
As a commercial artist seeing some pretty serious market disruption based on models that used my art and writing to create, without permission, credit, or compensation, I’d have a hard time not punching anyone in the AI business complaining about other people using their work uncredited. Then I’d probably have a real hard time not doing it a few more times. I’m confident I’d settle for just dressing them the fuck down, but it would take some real restraint.