Yeah but if you like Shaq and he tweets “hey this basketball is the best one I tried” then some fraction of his followers will just trust Shaq on the theory he wouldn’t hurt his reputation. Why not buy the Shaq ball?
Because he hasn't played in years and whatever ball he used was the official nba ball at the time. Most people would buy the official ball not a random ball.
If you are talking shoes then people will buy to be associated with that player.
If you are talking shoes then people will buy to be associated with that player.