Points are nothing. They just show how much time you spend on the forum.
According to this blog post by the webmaster, 3 0 is the most popular time control. (He didn't rank the others in popularity.)
The different in ratings probably occurs more when you play one of the less popular time controls like 30 0 and there are fewer opponents seeking such games.
So I know your rating increase if you win, and decrease if you lose.
What about points? What are they?
Also which game mode is common here? 5 min? 30 min?
And how is my partner chosen because there is sometimes quite big rating differences.