I'm working with the presumption that bitcoin mining is already occurring in these places, but that it's use is far from effective or efficient due to the burden of BTC fees. We already see this being the case in Venezuela, and the onboarding of many Venezuelans of late on Steemit ought to reinforce this concept. People want to earn crypto income and this would just be a pooling of the distributed hash power in these countries not an attempt to launch ones own mining operation. I'm sure as is many such mining pools already exist in these areas. But I believe the value of STEEM with it's zero transaction costs can be far more liberating to people such as this who are dependent upon the crypto income. Converting to STEEM on one's own however, given their marginal sums would prove far too costly. As such, bitcoin continues to be used as the medium of transactions in the status quo