- Tell more about your plan, does it involve hacking or carding? FB ads, investing on adwords, etc?
No of this.

- Is it a loophole on clickbank you are using?
No, this method don't work only with clickbank, but also with similar websites, any website who sell services and digital goods.

- is there a chance the method becomes outdated after a few weeks?
I'am using this method since 2006, I think it will never outdated, or maybe after 20 years.