Bigg Boss sometimes works like tournament sports wherein the form in earlier rounds don't count much as long as you make it to knockout rounds. Once in knockouts its all about the momentum. In Bigg Boss the momentum seems to be in the favour of MC Stan.
No doubt Shiv and Priyanka are the orthodox favorites with Abdu also a serious contender. But if you compare the traction they are getting specially on YouTube and Instagram, it is phenomenal in case of Stan. He is getting millions of likes on IG and over 30K comments on each post. This is unlike the bot based PR trends of Twitter. Even these forum based polls don't really count for much these days as the participants are at max in hundreds.
I am not a fan of rap music and that is western included. But they tend to have huge hardcore followers. If Stan makes to the finals the traction he would generate would be huge. He will have support of biggies of rap / hip hop like Badsha and YoYo who already spoke in his favor and who knows what kind of voting he may end up getting.
Last season is a proof wherein Teja suddenly built momentum from nowhere and won it. The orthodox favorites like Karan, Prateik and Umar were left behind for various reasons. This year might really be about the Basti ki Hasti.