Noel Chiappa wrote:
  I have been told that at one point Google was
'downgrading' results
 that used plain HTTP, instead of HTTPS, because they were trying to
 push people to switch to HTTPS (this was when everyone was
 hyperventilating over the Snowden revelations). Given the
 near-ubiquitous use of HTTPS these days, I'd have thought that piece
 of 'information credit engineering' by our tech overlords was past its
 'sell by' date, and now serves primarily to block people from finding
 the material they are looking for (as here). 
I often include the search term "site:bitsavers.org".