Bitcoin can help poor countries, because it helps actually their people to get some income online easily. I know many friends from poor countries making a living from earning Bitcoin online ,and it's can increase a new job for poor country ,that job can do by following campaign.
That is not the main reason I guess, only few are making income online because in poor countries only few know about bitcoin and we are talking here in general on how to help the poor countries and helping a little portion of their people is not an act of helping the whole country.
It's impossible to help to all the people in those countries. I mean if even a small number of people who would be very poor otherwise is felling better because of Bitcoin that is a great achievement.
What is good in using Bitcoin for those people is that the money go straight to them and they are not robbed in the process by the middle men which is almost always the case in poor countries.