Since I find non-descriptive headlines like this annoying (edit: looks like it's been changed on HN to be much better), here is a quote from the article that surprisingly provides its own TL;DR:

>Here is the tl;dr version of their story: Marketplace Lite, or “MPL” as they came to be known, devoted months to rewriting Healthcare.gov functions in full, working as a startup within the government and replacing contractor-made apps with ones costing one-fiftieth of the price. And when, nearly a year after the initial launch of Healthcare.gov, the website’s second open-enrollment proved much healthier than its first, it was the MPL team who celebrated.