Saylor Study & common degrees it's used for

[vetvso]

So I have not been a major user of Saylor courses for credit, and only recently began messing around with the system. Since I was currently using the material to study for a TECEP I thought I would just begin taking quizzes in a business course I know I might be strong in. It seems that after each quiz I get a set of questions with what is wrong or right, and I can print those answers out for study later.

So my general question is if one uses the answers from each quiz, and after getting 75%-85% on each quiz would you consider this enough to pass the proctored quiz for $5?

Also,  these courses seem to be a good fit for general management, and I was wondering what degree people have successfully used them for in the past.