I have a few ideas to discuss... if you want.
1) Leave it only 1 server and try to make him as popular as possible... minigames and lobby won't bring more players and jsut need a lot of servers.
2) Add a different, faster tracking system. The world is big and you can protect your things with structures, so it should be much easier to find bases and trackers get xrayed all the time.
You can spend Rupees to get the current coordinates of a player. For example you could pay 1000 rupees to get the coordinates of random online player. Maybe you got a lucky shot or not.
3) Try to avoid lag at all cost.
4) Maybe you could set a bounty on the player with the highest current score. (just an idea) It would give more people a chance for the win, if everyone tries to hunt down the first one.
Anyways you did a great work so far and all the features are very cool. A really hope there will join lots of player in the future, to make it a well-known server.