If you suspect that something harmless-looking might be spam related, check whether it was plagiarized.
That question was copied from another question, and the user's profile text was copied from some random web page (https://ancu.me/thong-tin-thi-truong-bat-dong-san/danh-sach-cac-chua-dep-gan-sai-gon-cau-binh-an-dip-le.html).
(I've raised a custom ...
I see three possibilities as to how that question ended up edited into spam:
The account was compromised sometime between when the question was posted, 2018-11-23, and when it was edited into spam on 2019-02-11.
The question was originally posted with the intent to edit it into spam at a later date.
The question was originally posted in good faith, but the ...