Okay, let me explain it.
"Reputation Power" and "Reputation" are different.
You can see your "Reputation" when you view your profile. And reputation power, beside your posts.
50 Reputations = 1 Reputation power.
1 post = 1 Reputation. 50 posts = 1 reputation power.
So, as you can see, spamming is a very slow way to increase your reputation power
. Rather, make quality posts and get others to +rep you (not ask, as it goes against the rules).