His "bonuses" are his only income first off so they don't really classify as that. And no, they're not tied to company's stock price. They're tied to revenue (or EBITDA) AND stock price. Just pushing the stock price up doesn't get him any more stock options.

He's visible because of his neurosis. He doesn't do it to make money. He's never admitted to it, but it's been hinted at in the past that he also has some kind of bipolar condition as well.