You can get a free £10 voucher (or $10 USD) for the Epic Games store that can be used on purchases above £13.99 (Not sure what the US equivalent is). All you have to do is subscribe to their newsletter.
Check it out here - Connect and Save! Subscribe to Epic Games emails and get a $10 Epic Coupon
Check it out here - Connect and Save! Subscribe to Epic Games emails and get a $10 Epic Coupon