I think you have a point. like for example if they join a high paying signature campaign. It is profitable to them if they convert the reward in their local currency, I am sure it has a huge value and can help in their daily life.
He's right. The signature campaign is not something a massive amount of people can rely on. Second, signature campaigns, in reality, pays pennies and dimes which would not translate to a job that can sustain your whole family.
I think those are rather myopic views, bitcoin is a big project and goes well beyond signature campaigns, faucets and many other means that are simply being used to sensitize people about the discovery. As many more people begin to adopt bitcoin, certainly lots of business opportunities would spring up and so would earning opportunities.
Probably, bitcoin can help poor countries by giving them the power of bitcoin itself. They can probably, make use of the facilities of bitcoin for their transactions within and outside the country. Also, they can also offer their services in exchange of bitcoins instead of asking for fiat currency.