Anyone knows what this is called and if this really works as advertised? I remember seeing this things years ago...

Realised it is actually a useful idea... @ Bukit Panjang, Singapore https://t.co/IJUrVATEe6
West Region
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JELEBU
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[]
anyone what this this really works remember seeing this actually useful idea
anyone knows called really works advertised remember seeing things years ago realised actually useful idea bukit panjang singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat houses."},
    ]

The post does not mention anything related to maintenance report feedback for public flat houses. The post is about the user's realization that an idea they saw advertised years ago is actually useful, and they remember seeing it in Bukit Panjang, Singapore.