I don’t see why mock tests/study material should not be free. That’s pure information. So there are some muggers who would mug all the right answers to pass but then the certifications wont take them far in life anyway coz they cant apply them in practice but there are also probably many who simply want to test their knowledge/speed etc and be better prepared for an exam by taking these tests. I don’t think it’s fair to do that. What if some people do not want to or cannot afford to (ok dats far-fetched but possible) buy a lot of study material? It’s about having fair opportunity to appear for the exams. It’s not like papers are leaked out on these sites (are they?).

And I also don’t see how going back to change an answer or think about a question could show an accurate cheating pattern…some people deliberate before answering.