You can learn a programming language and make it yourself, or learn to use Sentry MBA.
I didn't know you can use SentryMBA to crack giftcard codes (those without a pin) ??
How is this possible and why isn't it as popular as Spotify cracking and that?
Most people will just download a password leak and run it on popular services (Spotify, netflix, steam, etc) which is easier and less resource intensive than brute forcing 20 digit codes.