ption to Rocket League Credits get it for from xingwang's blog

supersonic. You'll have the option to Rocket League Credits get it for 1,100 Credits with the accompanying things:

There are a huge load of things available to all by finishing Frosty Fest Event Challenges, including paint gets done, wheels, titles, player flags, and that's only the tip of the iceberg. On top of the test prizes, you can procure up to five Golden Gifts, which highlight things from past Rocket Rocket League Items League series. Furthermore, you can get the "Ski-Free Player Banner" from the in-game shop for… indeed, free, only for signing into the game during the occasion.