FYI, American Express and Diners Club have already been banned from adding new customers in India due to the same thing.
https://www.reuters.com/article/india-banking-american-expre...
https://www.reuters.com/article/india-banking-american-expre...
I have a bunch of subscriptions (App Store, JetBrains, AWS etc.,) which continue to seamlessly go through without me having to explicitly authorise each month.
I suspect there is a fine print/subtext to that subscriptions rule that isn't accessible to public.
https://gadgets.ndtv.com/apps/news/amazon-prime-membership-o...
https://help.ads.microsoft.com/#apex/ads/en/52003/3
EDIT: Another useful one: https://support.google.com/pay/india/answer/10710851?hl=en
It looks like existing subscriptions were grandfathered until Sept 30, which is why you haven't seen a change. But new accounts cannot use subscriptions until the company has properly implemented e-mandates.
But I have a gut feeling that international merchants are exempted from this rule. Because I can go to JetBrains even now and subscribe to their products.