Hello Pragya,
Ya, they don't, instead, they have the category system, you get a good rank in VITEE, you pay nominal fees.
You get a bad rank in VITEE, but want a good(preferred) branch in a preferred college, you pay more, that's how they work.
According to data of 2018-19, category 1 fees for cse, me, ece in Vellore campus was- 198000 inr for Indian students. while for category 2 fees for cse was ₹250000. They don't force you to pay more. It's completely your wish, ultimately you get a degree of VIT University. No matter which campus or branch you belong to.
Hope it helps
*all fees is tution fees only, additional charges may occur, they are accordin to best of my knowledge, refer official site www.vit.ac.in for updated info.
Regards.
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