In the State of Arizona, can a company charge you a "Subpoena Fee" if you subpoena them to provide information in a civil case?

I recently got ripped off online purchasing some software, namely, the promised “product” was indeed a link to an Open Source application the original author is giving away free for non-commercial use. Turns out the domain where I got scammed is registered via a company called “Domains by Proxy”

Trying to get these little con artists, I ended up on aforementioned companies, I ended up here

Basically this says if you subpoena us to give you contact information of our “anonymous” clients, we will charge you for it.

Is this legal, or just scare tactics?