Pay per sale affiliate program

There are so many affiliate programs on the net. And the best affiliate programs are the one which pays per sale, here one gets a good amount of commission compared to the pay per click where in you earn only in cents. But the bottom line in pay per sale means putting in lots of efforts and also you must choose the program which you are most comfortable or have sufficient knowledge about the product.
So how many of you agree with this.

See original post by kellyfros