Clickbank affiliate website

Okay.. total newbie here.. it would be extremely grateful if someone would help me ...

Apparently I am stuck at the sign up page in Clickbank(almost every other affliate programs) because of the particular blank in which I need to provide the URL of my website.... thing is I don't actually have a website but a blogspot blog that I have been running for a while ... can I keep this blog's URL there? And am I restricted to promoting product on this blog only or can I add more to my account.. Also will I be able to do the same in every other affiliate programs?

Add any random website, You can promote Clickbank using any method. There is no restrictions.

You don't have to validate the site either, just put a competitors site inside the frame.

It approves instantly as well, don't worry about the application it is only used to properly identify you before forwarding the details into the account management section.