It's not so much to raise the post count....it's to give the top posters something for helping put the site where it is today.
Out of the top 25 posters, only about 10-15 of them are still posting daily.....so anyone who posts a few times per day will eventually be on the top 25.
The posts will be reviewed to make sure the person wasn't spamming his way up to the top....most definitely.
Zac