I wonder if it's significant. As developers, we're biased to think it matters, but in the grand scheme of things, 99.99% of people don't have a clue about open source or things that matter to hackers. As far as recruitment go, developers look primarily at how much they make, possibly the tech and how it looks on resume. There's always been a stigma around social networks and generally big tech companies, but not to the point it's going to hurt them.