>>2542
It dropped further after he deleted his threads. Those threads were active, thus counting for the three day period. Given the number of threads involved it's entirely likely that there were several people who only posted inside those threads within the three day window.
Even ignoring the explanation of how this website fucking works, if you were to read >>2491 you will see that the user count was above 520 shortly after he announced he would delete his threads. If one would assume that it took him a decent amount of time to delete all of his threads (I would, given the large number involved) it is entirely possible that the dip below 500 is still largely his fault.