What's the lowdown on chinese tag-team accounts posting questions+answers?

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I'm sure everyone has seen them. One account posts a question, the other account posts an answer within a minute. Each account might get used a handful of times before retiring.
I've largely been reluctant to touch them. The questions appeared legitimate the few times I bothered to translate, but they're usually not topics I'm familiar with, so I'm not the best judge of quality there. The times I've checked, I haven't been able to find that the material is copied from somewhere else, but searching for chunks of code rarely works, and the round-trip translation probably makes searching other text impractical.
I see some people marking them as spam, others as not spam. It certainly looks like it's automated, so maybe that alone is enough.
Any thoughts or observations? If you've drawn a red line, where did you draw it? Are there other distinguishing characteristics I'm missing?
  15 Comments
Walter Roberson
Walter Roberson on 26 May 2023
@DGM please leave the posts for that asked_by example for the moment; I asked Mathworks to check out the indexing problem.

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Answers (1)

Image Analyst
Image Analyst on 18 May 2023
The Mathwork staff is working it behind the scenes.

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