Folks these may not be scrubs at all IMO. Let me say again "IMO"!..Before I ran my grant offers I actually purchased the two I ran on my "grant blog" and checked the statements on the credit card to see actual charges. The one I had first had a $90 ping to the CC which was the $1.99 free shipping. The one I had second had no CC ping and only $1.95 shipping. So if the $90 wasnt there, There was no action. So I flipped the two offers.
Now, The only thing is, Is I did the test BEFORE my campaign went live but I can say it was profitable. I cant say that the one without the CC ping first on the blog made any difference. However IMO I think it did. It cost me a couple hundred to do this test but was worth it and paid off.
I am at all not saying that they dont scrub. You just have to look at other reasons and I think I found the most important one.