"Free software cannot impose limitations on use"
I am sorry you seem to lack the ability to understand copyright laws and software licenses. Software that is "free" is released for use under the conditions expressed by the authors, which may be the GPL. They can, and do, insist that if you choose to use their code that you respect that intention.
What you do with your own code is up to you, but should you wish to use GPL code then you have to play according to the rules of those authors.
"it cannot be considered a free software license, an "ideological software license", perhaps"
Call it what you want, but it is still a license and a large number of people chose to use it. You don't have to use it, after all you could re-invent the same work on your own if you chose not to abide by the GPL.
The GPLv2 versus GPLv3 argument is a lot more complex than you seem to comprehend. One key point is v2 has allowed the likes of TiVo to use the software in hardware but to prevent the owners of the hardware from changing it due to boot loader signing, v3 was intended to address that restriction on the end user's freedom.
"Statistical anomaly. Most companies trying the "buy support, get a free application" model have gone to the wall. I addressed these outliers, do try comprehending the complete argument next time."
Can you give some examples of these failures?
Off hand I can think of some obvious success, like Redhat and IBM with support as a directly paid service, and others like Mozilla and Android that are indirectly paid via advertising revenue.