Is that significant, though? These nations aren't trying to keep things secret. They just have to keep them out of the day to day thoughts of 95% of their population. Even trivial measures like a DNS-redirect will be effective in that regard.
Blackhole any sites people of the opposing political use for political organization, donations, news, propaganda.
As a first pass, you don't even need to block general-purpose platforms like reddit and Twitter and Facebook, you just need to kill the centralized sources of political information.
The point of this exercise isn't a full on repression of all dissent, it's just shifting the political window to topics and mouthpieces that are friendly to you. Most people have mainstream opinions, and if you tilt the mainstream landscape towards you, by driving your opponents into high-friction underground echo chambers, a first past the post system lets you turn a close election into a landslide.
I think they would fail to meet that 90-95% threshold, as India just can't be as physically restrictive as China or Russia. Circumvention measures would proliferate like crazy.
