In order to be considered as participating in the last event, a registered RE:NET only needed to kill at least 1 zombie at any time during the 10 days the event lasted. Now that the event has ended we know that 39,016 participated on it:
However, a few moments ago I just checked the top page of the site to compare it with the total number of registered RE:NET users. The total at the time was 160,671:
Basically only 24.28% of the total users participated in the event. This means that approximately 75% of the people that are registered on RE:NET did not kill even one zombie during the 10 days the event lasted. While we could attribute this to having many players just modes and/or campaigns without zombies, I think it's more likely that most of these players have given up on the game.
I was one that didn't kill any zombies in those 10 days. I played this game from release to about the end of October. And barley at all since. Was so pissed off when I tried to trade it in and they wouldn't even give me 30 bucks for it even with the 30% towards new a game. ='(
I still play RE5 though. Getting every last cent out of that game.
PSN: l-SOULJA-l <-=-=-=-> 360: SOULJA x360 l are lower cased L's