I visited in afternoon, and it was operational at that time.
Possible reason for less crowd:
(1) Travellers are still not aware / not carrying rupay credit card. (They might have other network's cards with wide lounge offer, but the same is not being accepted here as this Lounge is exclusively for rupay credit card with lounge offer only).
(2) When approaching to gate for boarding, travellers might be in hurry to boad or already availed lounge facility (encalm Or others).
Only one.. that is Exclusive Lounge for rupay credit card holders only. Obviously, it is assumed that the lounge is offered on your card by issuing banks.