The only real reason the player base died out on the Internode servers was mainly because of certain players doing multi-hax and no admin to stop it.
Definition of Multi-hax: When one player, running multiple instances of their game from various accounts on their PC, connects to one server, using several slots instead of one.
In Unreal Tournament, if someone is out/dead, when someone else joins they are dead too or rather they cannot spawn.
So what would happen if an admin looked in there would 3 or 4 players on 1 of which would be dead, the blocking player, whilst the other 3 would be linking each other for xp petting.
Definition of petting: In invasion with RPG monster/medic class, each player could summon 3 pets that would go fight and get xp. By petting with a player with high stat level of damage reduction, pets would not die but if the pets had low attack strength they couldnt kill monsters either, so lots of xp.
Essentially the server would be blocked by 1 player and no-one else could get on. Straight out DOS (Denial of Service) attack. And because we had no admins to speak of this went on and on til either no one played on the server or Internode decided to do away with the server due to lack of players in favour of more popular games.