This shows that open-source in general is expensive for Mozilla but cheap for the likes of Apple, Microsoft and Google who own their own Web browsers and have other open-source programming languages maintained by some of their employees full time. The actual reality of this is that they are still kept alive by a direct competitor for decades and haven't made anything to generate significant sources of revenue. Maybe…
For Apple, Microsoft, and Google, their open source activities are all loss leaders for their profitable ventures. Apple sells hardware, and most of their software offerings, like MacOS, their office suite, and Safari, and given away to convince people to buy that hardware. Also, it's not like they're spending a whole lot of time making Sarafi the best browser around. Microsoft's web browser was created (and bundled)…
That certainly depends on how big the bills are.