I'd say the same about Indian users like myself. The sort of people who are downloading this app on their last-generation hardware are unlikely to pay for in-ap

I'd say the same about Indian users like myself. The sort of people who are downloading this app on their last-generation hardware are unlikely to pay for in-app purchases, and definitely not for donations. Although you do have reviews on the Play Store claiming to the contrary, so your call to make. Also worth evaluating whether the PPC network you're thinking of using will pay you the same rate for audiences in these countries as they do for audiences in the West (which is already very little)