Same as with twitter: negative ROI. I just hate-read it and get pissed off at all the nitpicky assholes going "well, actually" at each other to no end. It's sad, but I don't know how to stop.
34, with about 800k saved up (mostly index funds, a third in 401k and the rest in taxable / roth ira). The lion's share is from the past couple of years after joining Facegooglesoftazon.