Great article. It does seem like the majority of popular startups do lack some sort of philanthropic effort. But at the same time (as sad as it may be), people don't care. It's difficult to imagine a world where an education app is #1 in the app store. In the U.S. at least, nobody cares about problems on a large scale unless it makes them look good. If there's little to no social traction in terms of solving a problem, then anyone willing to is facing a mighty uphill battle. It's easier to make distractions than it is to really change something. Hopefully that changes one day.