They are not – the are, after all, operating in a few markets with basically the same mechanisms as any market. And the continued insistence of more or less any for-profit company (and non-profit, and government,...) shows that it's effective.

But it was a point repeatedly made in the other threads about this redesign – basically "they're wasting their/our/my money on useless stuff like this when what they need to do is make Firefox use less memory/faster/whatever...".