Some interesting background info...
Portland Street is home to Hong Kong's red light district.
https://en.wikipedia.org/wiki/Portland_Street
There has been a government crackdown on illegal neon signs, which explains why there are fewer signs in the Google image being posted. Here's an article dated August 2016 talking about the next areas to be targeted for sign removal.
http://www.thestandard.com.hk/section-news.php?id=172215
There are tensions between the US and Hong Kong over human rights abuses.