I've mentioned this "deal" on the Youtube Premium thread.
If you create a Google account with a primary Indian payment profile, you can use the same account to buy apps or subscriptions on Google Play Store. Some apps are a lot cheaper if subscribed through an Indian profile.
If you have the app installed, you have to uninstall it, change the Play Store to the Indian account, and install the app. Once you open the app, the prices will be in INR.
Truecaller is just one example.
There is currently a 7-day trial if you want to try it before making a decision. I've found Truecaller very useful to block sellers and spammers.
I couldn't find the RRP in Australia, it seems to be $15.99/year in USD.
The Premium Gold is INR 5000 (or AUD 96), or USD 149 (my Australian account says AUD 299 as the maximum in-app purchase, so that's probably the Premium Gold price in Australia).
*I've previously used the Urban Free VPN extension (Edge) to create an Indian Google account.
Ahhh….. The irony.