I would say the UN's Online Volunteering service has had success with helping people in the developing world by involving online volunteers. There are testimonials on the site from organizations based in the developing world, as well as orgs focused on such but based elsewhere

Testimonials posted on websites of organizations whose funding

is based on a declared mission to help people in the 3rd world

are, perhaps, best taken with a grain of salt. There are reasons

why a person in the 3rd world would make such a statement, when

maybe, it is not made so much from the heart, as it is from the expectation

and hope that flattering the patron might still lead to some kind of benefit.

Is there a way to actually verify such applauding statements and approbation?

A testimonial might be tainted and/or is outdated. ARE there actual studies

carried out, designed, and financed by the 3rd worlders themselves, that confirm

and quantify, in some way, the benefits realized by means of internet volunteerism?