I don't see a good point.
1st You already paid $50 for the game.
2nd You barely have control.
3rd If you make cool plugins after the canpaign it'll send players to another server.
4th To change most of cvars you need sv_cheats. Which not even SendConVarValue prevents clients from using.
5th After canpaign ends your server is stuck in finale map (fail much?)
6th You can pay $12 in trade for no one joining your server due to fail password system. (connect and open console. Why? Mess a bit more of course)
Does anyone actualy see a point?
Whenever your server is full after the canpaign players will be sent to another server by lobby (Which was the worst idea ever!). Server owners have basicaly no control over server...
I bet if valve doesn't fix it for server owners they'll lose many servers. Yet there are many because it's new but without control peoples get bored (like me).