0
If you were a recording artist, this would be called: signing bonus.
When you open an account you probably get this "side benefit". If you look at the top of the home page, you can find a number in light red. On weekdays it usually says 20, on weekends it is 220. You can use these credits to buy assets.
For details:
https://www.cgtrader.com/pages/cgtrader-loyalty-discounts?section=type-of-credits
How do i use them?
You can use them to buy models over 15 bucks and get a third off them I believe. so if you buy a model for 45 then you pay 30 and 15 comes out of the credits