Epic Games store is offering $10 of store credit for adding a free game to your Epic Games library.
How to get your free $10
Log into your Epic Games account and add Rocket League to your library by clicking the “GET” button.
This game is free. Link: https://www.epicgames.com/store/en-US/product/rocket-league/home
That’s it. $10/£10/Etc has been added to your Epic Games account. You’ll get a notification on the page to confirm this. You can spend this on other games on the Epic store.
This offer expires on the 23rd October.
What’s the catch?
You need to spend your $10 before the 1st November.
The free $10 can only be used on games or add-ons on the Epic Store that are priced at $14.99 or more.
What if I already had this game in my library?
You’re out of luck. Make a new account, maybe?
Thanks to @Instinct for making me aware of this.