Vikas himself used the same strategy to become friends with someone who is favoured but Vikas never crossed lines, he knew his limits and that's why he was respected for what he did. That made the difference. I don't think VIKas is called to make people realise how to play game, he was a popular contestant, only motive to bring him to generate more TRPs, he was called in last season too, that too twice, but nothing changed the game play of contestants. They will play the way they are playing . He has come as a contestant not as a mentor that people will listen to him. People don't listen to Salman, then how would people listen to him. Imam was called in season 9 just like Vikas and imam was badly disrespected by the contestants in season 9. So nothing will change, they will play like the way they are playing. It's just to add spice nothing else.