There is a big difference in roadies/splittsvilla and Bigg Boss. Most of the people come in MTV reality shows are new, trying to get noticed by Producers.
Rannvijay Singh is still waiting for his TV/Film big breakthrough. Sakhshi Pradhan didn't survive BB4. Sid was one 'chalta purza' who took side of Mahek at the right time and secured his position in finale of BB5.
People who come on BB are different. Most of them are in showbiz for more than 5-6 years with established connections. They are on family terms with some directors and producers. So basically they have comparatively better background.
Naturally, Renee has to think about her long term career plans. But I know one thing for sure, she was honest on roadies as well. She is not a backstabber either but she has also a potty mouth.
So just wait and watch and pray when her patience will be over.