An extra bonus perk given to players that upgrade their accounts to sponsors, is the choice of a reward dependent on how many years the account has been sponsored.
1 Year - Sea Horse - Original breed color = Heart of the Ocean
2 Year - Night Horse - Original breed color = Night
3 Year- War Horse - Original breed color = Pure Black
4 Year - Ethereal Horse - Original breed color = Translucent
5 Year - Alicorn - Original breed color = Pure White
6 Year - Box Dyes - See choices here