Solving first world problems gets you first world ROI. Y-Combinator is an investment firm. I'm not judging, I don't have a dog in the fight. But I'm pretty sure that's why you don't see stuff like stopping brown outs in rural sub-Saharan Africa on this list. There's no first-world money in it.
It's a trade off. There's a lot more money in the first-world. But there's a lot more users in the third-world. That's why the third-world is called the majority-world.
