it is a myth that marbury produces points for a team. He is a black hole with the ball. He is a net negative for the team.
Consider this. When Marbury is on hte court, 50% of the knicks baskets are assisted. When he steps off the court, 53% of the knicks baskets are assisted. Contrast this with Snow. When Snow is on the court, 56% of the cavs baskets are assisted, when he steps off of the court, the number drops to 50%.
And Marbury wouldn't be taking the ball out of Snow's hands, he'd be taking it out of LeBron's hands.