They have secret shopper crap like that too!
My wife and I used to do the secret shopper thing, but when we moved, we can't find one for our area (actually, we're looking for several to join) and all the ones I found online were the same thing....pay us some scratch and we'll hook you up.
We signed up for some free survey groups, but they aren't often enough

Why on earth WOULD someone pay to get in on these things? Go give blood for money or something, jeez!