I think the non credit after the 1st survey was on there end. I did two today, both did credit, then I got more older credits, the numbers are very different so that is what I think they are. So I say its safe to do more than 1 if you can.
Jtowner
I seem to be getting older credits, I was able to do 3 today, all numbers in sequence, then I got 3 others that were not the same numbers at all. Not sure I did do a lot that never did credit, or 2nd or 3rd that did not credit. I am quite confused by SS.