Has anyone ever been paid by them? I requested pay out over a week ago and haven't heard anything.

I tried emailing them with no response received.

Sorry to hear that,you should research before joining these programs.
I can tell you the one below in ymlink do pay! with 24 hrs online support
and paid monthly regardless of your balance to your choice,egold or paypal
so rather than wasting time with annonymous sites join safe and solid site which would pay you even single penny on monthly basis automatically!
Give it a shot,you won't regret it!
LookQuick is way better than most search engines and decent with its affiliates as they don't hold funds received thanks to you since you reach 20 or 50 dollars to cash out!!