I think the parent's underlying point is that, while the title's usage is perfectly comprehensible, the word is unsavory as part of a headline on a news websie. To go through the well-worn analysis: "ghetto" has strong connotations of specifically black poverty and crime, and is often used as somewhat comic shorthand for these issues, which is arguably offensive to people for whom these problems are their lived reality (leave alone its extensions in phrases such as "ghetto fabulous" and "ghetto queen"). I'm not black but I am a racial minority and I've always been attuned to words with valences like these, and I do micro-wince whenever friends or acquaintance use the term flippantly in conversation. So it's usage in this context is worthy of comment and pushing back against it legitimization, especially when its usage adds absolutely zero value above substituting "high crime area."'
With the caveat that I don't have a lot of experience with the iPad's pdf support I'd say the Fire's support is solid. I recently read an entire e-book in pdf format on it. The main limitation is that there isn't a lot of screen real estate so if you want to read it on a full page scale you need to tolerate a very small font (this was not a problem for me). A cool upside is that when you get a Fire, Amazon creates an email address that you can send emails with attached pdfs and documents which will then automatically be downloaded onto your Kindle.
Overall nothing mind blowing but if you like e-readers I think you'll be satisfied with the pdf support.
Clearly this type of service isn't going to be the only way developers get jobs, and yes it may be somewhat insulting to people further along their careers to make them do this, but for someone starting out who doesn't have a large portfolio of achievement, or (even more importantly) doesn't have the degrees or college backgrounds that have increasingly become the primary metric for determining who gets entry level software engineering jobs (despite the ample evidence that these metric have minimal to any correlation with programming ability or productivity) this seems like a potentially life changing type of service. Anything that takes steps towards rationalizing the hiring process in our industry should be rejoiced. And if there are other services trying to do similar work too all the better- it's a big problem.
That said it would be great if you all did work on trying to push the meter more towards real world type of challenges as opposed to what do tend to be fairly contrived 'interview' style questions. The benefit of the platform you are building is that you can get people do work on larger scope problems that do a better job approximate the real day work of engineers. See as an example in this direction reddit's challenge to aspiring front end developers to build a reddit clone a couple months back: