They're not making profit, that's the entire point.
> Sorry but I'm not really a fan of this "make your own (...)" attitude, especially when excusing corporate behavior against volunteers
I'm similarly not a fan of discounting just how much money and work goes into building a company with millions of users, having helped do that in the past. My comment was not glib, it was entirely sincere; if you want to know just how much it costs, host your own community and see just how "greedy" it is.