I have to go with the, "stiffy rocks" people...It's the only per sign-up I still promote. Partnerships are the longgg term solution for me.
As far as ratios go, I send pretty crappy traffic and do 1in400 or so, but I did like 1in50 with AP, because the source of the traffic was very different and most was say 1in50 is BS too...So you never know!