£50 of UK Nintendo eShop credit for £41.50 @ Zeek

This is for new customers only. You may be better off getting a referral code from someone else as you get £5 off and they get £10 off too.

I have already used Zeek before so the codes don't work on both my accounts.

Note how it says first purchase here.
I haven't used this specific code before but have used a new customer promo before.