After making group discussion and external advice, at this stage of production group decided to maintain the "free to play" mode unchanged.
We hope to attract the masses to active groups in the world game player,
As well as providing large amounts of data to test the main producers to repair BUGs.
Have fun!
Effects in future:
1, frankly speaking, the game producers' equipment is not very good, and there's no economy to upgrade equipment in a short time.
2, maybe future will have DLC about DIY content which you can choose to buy.