Earn reward points in various ways and spend them on many different options in the GUI reward store.
The more you play the more you will get paid for time as well as resource gathering and hunting, the ingame money that you earn can be exchanged in the reward shop (/s) for RP points so you can spend them in the item shop.

Chat Commands
/rewards check - Display current reward points and total time played on server
/s - Opens the reward store