[Catalyst] the Promo Code of DreamHost

[fayland]

I'd like to register a new host at DreamHost to help Catalyst as 
http://dev.catalyst.perl.org/wiki/Dreamhost
But what's the "Promo Code or email of who referred you: "?
"(Important: Using a promo code waives the right to say who referred you.
You may not change/submit a promo code or referrer after you've finished 
signing up.)"
https://dreamhost.com/signup/?next_step=Index

or just click from the wiki and omit the Promo Code?
Just want to confirm that I'm not doing anything wrong.

Thanks in advanced.

-- 
Fayland Lam // http://www.fayland.org/