There is another special case, but it's selling software in spite of the GPL; home routers, set top boxes, etc. Were they to use GPLv3 software, they'd have no way to protect against another company using their (potentially substantial) work on the software, building/copying the hardware design and creating cheap knock-offs within a few weeks of release, making it too costly to continue.
If a group of companies and individuals wanted to come together to build a new router platform where all would contribute back to it, but they could differentiate themselves on edge features, management interfaces, etc, the BSD license is good enough; and probably a better bet than the GPL.
There seems to be a phenomenon on HN of hardcore anti-copyright or pro-piracy posters who reply antagonistically to posts that they appear to have either deliberately misread or not read at all.
That is blatantly false. Who gives a shit if they are selling software, or selling "support" for software? Either way people are making money with GPL software.
There seems to be a phenomenon on HN of absurd pedants deliberately derailing conversations.
"You do realize that people sell GPL'd software all the time, right?"
You specifically said sell and I asked for examples.
So sue me.