That sounds correct. AFAIK most countries in the world do not do credit card AVS (address verification service) so aside from a select few countries you would be able to enter just about any address for those country's cards.

e.g. related discussion https://money.stackexchange.com/questions/11979/in-what-countries-can-credit-card-merchants-use-address-verification or just search the internet for other sources.

The one catch is the card would have to be from that country that doesn't support AVS e.g. for India I think you are saying that you used an India based card, right?

Yeah as far as I know this still works.

You need to use a valid address (there are sites for generating one)

You also need to use a credit card that has never previously been used in Google with another address

Do you know of anything similar for non-US residents?

Proprivacy.com seems more like reviews for VPNs and other privacy services. They listed one service, blur that looked promising. Unfortunately, it's only available to use for US merchants.

Privacy also looked promising. However, they require users to provide their SSN and that's not something I want to give for something small like this.

Always but I abandoned iphones years ago when the cat and mouse game got to be too much. To stay consistently jailbroken requires some serious dedication.