View source for King of the Hill

This is shown by a small yellow dot next to a person's name. If the player 
has a yellow dot, he/she is still eligible for KOTH points. If you have KOTH, 
the time that you will still have it is shown on the right side in the middle, 
next to the symbol of a crown. You can increase this time by killing enemy 
players. If you kill someone with KOTH, you get your timer completely refilled, 
while if you kill someone without, it is partially refilled. The timer, I 
don't believe, can not go above its initial amount.

If you are the last remaining player with KOTH status, you get the jackpot 
points, which depend on the number of players playing but varies from zone 
to zone. If only you and some of your teammates have KOTH status, you and 
those teammates split the jackpot evenly.