[ChuckMcM]

I had read that, and so the 'cost' is the marginal cost of "support", "moderation", "legal" (assuming no features QA is probably not huge). So is it possible to operate a feature that has user generated content at at a positive margin? One without compromising privacy or incurring an untenable liability? I accept that this may not be possible, but it seems like that is where the engineering work is.

And yes, I know product managers are "we need new stuff" to push all the time. And sales is constantly trying to sell something you don't make. But those are execution issues that good management will moderate.