And the practical differences are?
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.
"sell"
So sue me.