you sure you know what you talking about..Nike isn't a luxury Brand, that comparison doesn't actually make sense. Nike sends it overstock to discount outlets all the time.
Gucci destroys all of their overstock to maintain exclusivity and high prices. You can't find Gucci at payless. But if people are were now able to pick up Gucci loafers at your local salvation army for $15 it would hurt their pricing model and bottomline.
Nike also burns unsold merchandise.. and, Gucci has bags at Marshalls..
RETRO READ: New Gucci Bags at Marshalls, Céline at T.J. Maxx: Is that Legal?