Employers do not care about your open source work beyond it possibly demonstrating a commitment on your part to performing unpaid (and unappreciated) labor--which they euphemistically describe as "passion." That's it. Do not expect job offers from it. You'll get ample recruiter spam sent to whatever email address you associate with your projects, and possibly feature requests or complaints from entitled corporate users, but little else. In fact, it's apparently too much to even expect marginally less painful job interviews with fewer hoops to jump through as a result of your open source portfolio.

Companies (and VCs like YC) not only do not adequately compensate those who produce the free software they use to build and grow their businesses, but they show no greater inclination to hire them, despite using their software. (Zed Shaw has written about his.) Absent a clear monetization strategy, I think the time developers spend working on open source side projects would be better spent building personal wealth, especially considering how many of them will effectively become unemployable once they turn forty.