When the game was new I suspect that law enforcement were asked to provide lists of areas they would like to search but did not have the time or manpower to cover, and that these areas were used as points of interest in the game.
There is also the fact that the CEO of pokemon go's developer/publisher was partly funded by the CIA when his company was building what would end up being Google Maps. I would be surprised if he didn't keep a few contacts in the government given his career.
Maybe I'm paranoid, maybe a boom of people wandering around aimlessly would have found just as many bodies.
If libraries did not exist and you purposed them today, you would be labeled a pirate and likely used into oblivion by the 3 or 4 massive companies that "own" all media. It's not strange that there is an overlap in the tools needed to preserve media in a robust, distributed way, and the tools used to distribute movies, music, and books.
You've never requested your data from google. I did a while ago and found a dozen recordings of my voice from my pocket despite having the voice assistant turned off.
Archive.org is the largest digital library, a very new concept, that I know of and they are constantly being sued.