To sign up for the ClickBank affiliate program you need to use the link below:

https://www.clickbank.com/affiliates/

and press Start Here on the main page.

Follow the steps, fill in your personal, billing, and account information.

Important step. You need to create your Nickname. Nickname is actually going to be your ClickBank affiliate ID which you will be using in the ClickBank Feeds generator.

You can have one or several nicknames. Find them in the Account section: