If you're looking for the Best PokerStars Marketing Code, an obvious place to start would be www.pokermarketingcode.org. The site offers exactly what it promises, which is a PokerStars Promo Code that gives new players the following:
* $50 bonus on your first deposit (100% match up to $50)
For Spanish speakers, check out Pokerstars Codigo.
Promo codes and marketing codes can be pretty helpful to new players as they learn the ropes, as the extra bonus money can definitely keep your head above water as you work on various aspects of your poker game.