LOL!
We tend to discourage double posting. Once upon a time, we were pretty close to hitting the End Of The Internet, and one poster (who has subsequently been banned) spammed the thread, trying to rack up the numbers. That resulted in us being pulled. We begged. We pleaded. We cajoled. And after a couple of hours, we were reinstated.
We used to like to hit the 00s, the 000s and the 0000s, but we've backed away from that a little. Once a while, someone will swoop in and grab a 000 post without ever posting before that, or they will post once, and then come in for the kill.
That takes the fun out of making a mini-celebration out of posting the 000s. Of course, there is always Dead Corpse and his 666...;o]