I am an Act Giga user and pay for their half-yearly plan which gives me 3 extra months. So it comes to 3999/- and after taxes (18%) it costs ~4700/- p.m. They have an additional unlimited offer of 500/-Netflix cashback every month, which is an added benefit (4500/- for 9 months).
All other ISPs have the same rates for their gigabit connections. Airtel xstream provides free Amazon Prime (999/-), whereas Jio Fiber provides access only to their own OTT platform.
I would say that Act still trumps the other two in terms of value.