Hmmm, the map only shows 3 today, 2 of which seem to have been put there explicitly by @TwentySixer (and actually are at -2.2208, -0.4000), and another from an unknown user (at 0.3323, 0.5708).
It seems that thethingsnetwork.org/gateway-data/location does not really work around there, not even for an extremely large distance? (Right now, the community is actually defined around -2.2208, -0.4570.)
TTN Mapper is filtering when both latitude and longitude are zero. But when it didn’t while TTN was having some NOC issues around May 27th, @thucar posted a nice screen capture on Slack:
That would surely have changed the leaderboard. 
