They give away tons of free stuff. They've earned the right to ask for some $$$.
That's a new one. How does someone getting making a living while developing open source software mean "everybody loses"?
You can, however, do it as a function of your work for your employer. Almost all of today's viable FOSS started like this, because it provides the financial security and moral support you need to bring a FOSS to maturity.
That's not to say there is something wrong with it. It just seems confusing at face value.
I'm not really sure why the idea is such a foreign concept to the point where you need to insinuate that I think that Free software "falls from the sky" or some such nonsense.
Good thing they're selling a product then, not asking for a handout. And hey, as a bonus, they're releasing a fully refreshed set of icons for free!
Your perspective on what open-source can/should be is utterly unrecognizable to me. I'm glad it seems like the majority of people are finally getting comfortable with the idea that you shouldn't have to choose between making a living and contributing to the open source ecosystem.