I had a bizarre encounter when working there, also Maps related. I lived in the UK at the time and my post code just didn't exist in Google Maps. I did some digging, and found out that in fact no post codes in the UK had been added in quite some time.
Eventually I found out why: There was some lead dev on Maps, who refused to allow new imports of UK post code data because he thought they were "wrong". They were seeing data with multiple post codes for the same building!
For the record: This is valid in the UK, as there's a maximum number of households per post code or something like that.
Not sure how that ended eventually, left a few years ago, but I just checked and those post codes now exist.
Eventually I found out why: There was some lead dev on Maps, who refused to allow new imports of UK post code data because he thought they were "wrong". They were seeing data with multiple post codes for the same building!
For the record: This is valid in the UK, as there's a maximum number of households per post code or something like that.
Not sure how that ended eventually, left a few years ago, but I just checked and those post codes now exist.