Alright, you don't like rhetorical questions. I'll phrase it in a form of an assertion.
You are playing a game. This "game" revolves around linking to your own site. You play it on an almost inactive message board. No one else is playing the game with you. You keep replying to your own posts, sometimes for ten days at a time, one post each day.
A guy comes along and asks you a rhetorical question, in hopes of an illuminating answer. He gets a tautology - "I'm doing it because I'm doing it."