The ads often crash the app on my tablet and occasionally my phone too. I've taken to refreshing the content and then switching to airplane mode to cut off network connectivity. You don't get images but you can read all the text as articles are downloaded to your device.
In scrolling around, it looks like debt load corresponds to the locations of colleges. Seems simple that if you want to know where there is student debt, you look for students. The delinquency and income correlation is more interesting.
Well, you'd want them to try to crawl it. Perhaps there was a bot crawling their site for such links and they wanted to identify specifically that one. It seems most likely that such URL's never existed, but this would be a decent way to identify a bot that's otherwise not distinguishable.
Disallow is used to exclude certain URLs from being crawled, in this case it looks like a search query as the store's search uses this pattern: http://shop.nordstrom.com/sr/query.