TFA is a reminder that the metrics we use to assess the impact of open source software are old and outdated. How does a market cap reflect the new value of commercial software, which has had to raise the bar to beat features and performance of the 'free' competitor. How do you quantify the benefit of open source to the actual open source developers? The latter is arguably intangible, but significant. Someone can simply google my name and see production-level code I've written, support messages I've posted in forums, and conference presentations I've given. There is true economic value in this output, but how do should it be quantified and aggregated?