Steve I think there are a few out there who are just looking at it from a risk v return perspective and deciding it's not for them. I include myself in that category.
I know that if I play the same ready go a dozen times, I will be ahead in credits. Along the way however I may flunk a few, be average in a few, double up in a few and top 3 in some as well. The problem is I have no idea what will come first, success or failure. At 5,000 credits a go, a dozen entries would exhaust my credits, in the worst case scenario. Even finishing outside the top 15 would see my credit bank half in a very short period of time.
The bottom line for me is I ain't risking it until I return to form that sees me with better odds than I have now.