This is a steam gift (not a steam key), and it is region locked for LATAM. It can only be received by a winner from the following countries:
Argentina (AR), Bahamas (BS), Belize (BZ), Bolivia (BO), Brazil (BR), Chile (CL), Colombia (CO), Costa Rica (CR), Ecuador (EC), El Salvador (SV), Guatemala (GT), Guyana (GY), Honduras (HN), Mexico (MX), Nicaragua (NI), Panama (PA), Paraguay (PY), Peru (PE), Suriname (SR), Uruguay (UY), Venezuela (VE)

So, if you win, please add me on Steam to claim it. Good luck!