You receive the points when the product is ordered and you can use the points as cash for the next order. You can see the points on my page. (Points cannot be issue as cash)
Depends on the member rank, 1~5% of the purchased amount is issued as points.
"Gtrade" has up to 10 levels of member rank and there are different benefits, such as discounts, per each levels of rank. You can level up by number of order and total amount of purchase. (1~5% of the purchased amount is issued as points.)