Why do we modify Arena's short-term earnings model

The arena short-term earning model was the first short-term earning model published, and it was supposed to benefit our players for accompanying the growth the game. However, as more short-term earning models were published, the Arena model had become too average and not matching the purpose of PVP. The new model will be giving a significant weighted bonus to the top 10 as well as top 100 players, bonuses will be added according to lineup so that PVP with arena will be more competitive.