The victory condition is checked before the two second bonus is given, instead of after.
This means it is possible for a player to reach or exceed 10,000c, but not win if they drop back below 10,000c before the 2nd two-second tick.
This occurred in a game with Blarg, where a bunch of players (including myself) joined near the end of a game. Blarg was wondering if he should just jump into the Robo to end the game so we could start over, but he did so while I was on the way to the Feed Box with a corpse. I dropped the corpse in after his money rose to 10,014c, but it dropped down to 9000c the next tick, and the game didn't flag the round as over.