There's different ways of measuring the success or "waste percentage" of a program like this. Just putting two boots on the ground costs more than hundreds of these USB sticks, so, if you can air-drop a thousand of them and only 10 find actual use, you're still doing better, efficiency wise, than hand delivering them and successfully personally training 10 people how to use them.
If a village has a solar powered "computer center" with a satellite internet link and 3 ten year old PCs that these sticks can work in, all people within walking distance of that computer center have potential access to a miracle greater than the mythical Oracle at Delphi. Yes, people will have to learn a western language to access most information, yes it would be slicker if they had a satellite linked laptop with a urine powered battery that they could carry with them, but with $40K in funding, this project has the potential to positively impact a few thousand lives, figuring 10 people benefiting from every one that gains useful information from the internet.
Maybe it catches on as a fad and thousands upon thousands start to access computers and the internet this way, probably not, but for the same investment level as a project to put a drinking well into a couple of villages, this project can have a different positive impact on a larger number of people - who might learn how to dig their own wells, among other things.