"Create an iTunes Store, App Store, or iBooks Store account without a credit card or other payment method" https://support.apple.com/en-us/HT204034
I've always end up back in UX loops wanting my credit card since I seem to need a new version that is free but in the app store to get security updates..
Make an account - does not require payment option
Buy a FREE app in the store
None will be a payment option as one of the possible credit cards (as you dont have to pay for a free thing)
They have been always been available for download from the Apple site: