Discussions

During my final year, I was a student representative and also worked a late shift. My advanced calculus exam was scheduled right after a major event I had to organize. I was so tired that I could not focus on studying. I began to look for a solution and saw some people online mention they had to pay to take my Mathematics exam. I wanted to start a discussion about this. Is this a common choice for students facing a similar time problem? What are the real pros and cons of getting this kind of help when you are truly stuck?