Referback may have made it’s mistakes, but every time it stepped up to the plate to fix them. This is where reading posts can be misleading. There will be hundreds of heated complaints and then one small thank you post at the end. What remains is the flavor of the heated posts, not the realization that the program stepped up to the plate.
There is no objective way to do such a poll as this.
You can go to APCW and see math based evaluations.
Here it is all individual opinions, and there are as many as there are webmasters. No one will ever agree on which programs are best because there is no one program that is best for all.
We are all lucky to have such a big selection so we can test them out on our individual sites and see if they are a fit.
What we can do and and always do is warn each other about real fraudsters, and we kick these programs off CAP.
We may not be able to promote each program equally, but we sure as heck know who doesn’t pay us correctly.