[kevingadd]

One solution used by companies like Blizzard for dealing with region-specific rules and taxes is to sell a different product in each region with its own pricing/rewards. Given that Apple and Google already don't want in-app virtual currency to be transferable between platforms (otherwise you could work around the 30% cut), it's not unreasonable to sell different products to different audiences. Who knows whether they'd decide to punish you for that anyway though...