Continuity mistake: When Jake is serving the cream he uses his left hand, then right, then left again between shots.
Continuity mistake: When sitting in the brig, the position in which Namani sits changes. She shifts in her seat, changing the letters visible behind her. (00:55:10 - 00:57:45)
Answer: The film never addresses this, and in fact the kaiju black market is never even mentioned. Any answer would be speculation. You could argue that it has been a decade since the events of the previous film and in that time the kaiju black market could have collapsed for any number of reasons (lack of demand, procurement costs, government regulation, etc). We must also consider that the writers were not concerned with consistency between this film and the previous film. Since Hannibal Chau does not appear in this film, nor is he mentioned, the idea of a lucrative kaiju black market appears to have been dropped. Since this film focuses instead on a jaeger black market, it might have been a conscious decision by the film-makers to ignore Hannibal Chau in this film to avoid confusing new viewers who didn't see the original film.
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