Adding to Krisps reply,
CONSTRUCTIVE posts add to your post count. Usually unconstuctive posts will get deleted and make your post count go LOWER, 3 examples:
1. The one word post:
This is SPAM. One word posts arent counted as constructive...
2. Posting excessive smilies:
(x30) Posting excessive smilies WONT help....
3. Flaming: OMG U stink! (NOT REAL, JUST AN EXAMPLE)
Flaming is the WORST kind of spam, and can get you banned
Hope I helped!
Oh and by the way, youre very welcome