There is a large marketplace for trading Rocket League items for both in-game currencies and cash. This was first deployed in 2016, but it has since undergone substantial modifications, such as the Trade-In system and other security features. The move from a normal loot system based on chests and keys to a much safer system based on blueprints and credits has been one of the most major adjustments.
This relatively new method has eliminated the “gambling” aspect of loot boxes, as you now know exactly what you’ll get if you spend some money on it. While we’re on the subject of currency, Credits are the in-game currency that has totally replaced keys. You can only use your Rocket League Credits to unlock Blueprints that you really want and believe you’ll need the stuff you’ll obtain from the “trade.”