Comment by wisty
People are single but romance scams exist.
Scammers are good at the scam. They are good at telling the right lies, they often work in teams (lead finders, closers, and everything in between), use automation where appropriate, etc.
A single dev might have trouble cracking the lead finding code, the resume code, the interview code, etc while and avoiding telling any lies that will get then fired 3 weeks into the job. But a team who all treat the application process as a full time job? It's a lot easier.
Also when a dev gets good at finding a job, they stop looking. Scammers get good at it and then keep getting better.
Maybe these North Korean scammers could make good money by selling their job application tips and tricks to actual talented out of work engineers. They seem to not be struggling to get these jobs, unlike actual developers who are struggling.