I agree very strongly with Stallman and the points he regularly makes regarding the dangerous of proprietary software, and I am very grateful for the things he has done to push his ideals and to increase awareness of the issues and dangers surrounding copyright abuse and the freedom of software users.
I also create and sell proprietary software, and I disagree with him that it is immoral to do so.
No need to oppose him, I can simply disagree with his conclusions while agreeing with a very large number of the points that he makes.
Agreed. I won't go as far as he does, but I thank him for making a stand. As far as the user makes an informed choice, I am not against selling proprietary software. Still, God kills a kitten every time a proprietary license is sold.
Even if it's your startup selling it?
Seriously, when your user knows and willingly enters what has a good chance of becoming an abusive relation (depending on your upgrades, being unable to migrate their data, forcing you to support ancient versions because they don't have the money to upgrade), I believe it's fine.
But I would prefer another model.
They probably don't feel like they're resigning their fate to an abusive relationship.