To add to my post count.
For the guys (and girls, if there are any) you wouldn't notice the download hit because having been here all the time, as a mod is released, you just download it, whereas for a total newcomer, or someone that was away from the sim for a while, like me, coming into an environment like this that has so many excellent mods means we try to download them all in bulk.
I think imposing the limit is a good idea to draw the lurkers out and into the community (myself included); i've never been a big poster on most forums i am a member of, mostly due to the level of expertise that already exists within that community, but i'd help where i could/can.
Hey, do we get bonus download points for longer posts?