The second thing is that these bitcoin payment systems only work because they dodge the minimum wage. There are a lot of things that homeless people could do if it was legal to pay $.60/day. The minimum wage does a lot of good, but the people in this article didn't seem to mind the situation. I think it's because a lot of people don't think of working online as "real work" and are ok with low paying tasks.
All in all this article was a feel good hit. Bitcoin allows homeless people to avoid the shame of begging and the risk of robbery. They receive support from their community to earn legitimate money by doing real work. Of course fake youtube views and button pushing aren't very beneficial to society, but I think there will be more useful work for them and others in the near future.
A functioning human brain is a very rare thing in the universe. The way we get ahead is by utilizing everyone of them that we can find. We often write homeless people off as a drain on society, but there's something to be said for everybody pitching in, even if just a little bit.