Regardless of the legal case, the idea that concerns of reputation or credit are irrelevant to open source work is a crock. People may be working on open source because they genuinely want to help others, but if you deny them credit for the work they did then you can very well expect the well of open source innovation to dry up pretty quickly. And for a company like Microsoft, reputation is exactly why they are contributing to open source in the first place.
I'm not even sure if the author's idea was original anyway. It looked more a CLI program to download and run installers.