I'm not sure that top mnc's are recruiting through R-SAT or not but i can ensure that mid level companies, mechanical & most of the core related companies are recruiting through R-SAT exam.
I faced many problems to get the job. Its main reason is that I was an average student and I was not good in communication also. My college didn't give a single opportunity. I decided to prepare hard to enter in IT industry. Surely it came as a very good experience as I came to know about my various skills and even my personality traits. This helped me in cracking subsequent interview rounds and getting placed