Or perhaps the GPS numbers are not random but do contain 'information'? Perhaps totally unrelated to geolocation?
Each client has his/her own UUID(the tweet) and the geolocation is where the client is located.
It seems as though the googuns_staging was the trial, all fake/useless location and googun_prod(as the name suggests) is the actual "in-the-wild" run of locating all of its clients
Also interesting is at the moment there are many tweets ending in either a350000000 or baf200000000 but that may just be coincidence based on some counter thats incrementing