> Don't be a free user.
Now that's just rude. Not even the linked article [0] manages to convince otherwise. In fact, it even shows the opposite standpoint:
> If your free software project suddenly gets popular, you gain resources: testers, developers and people willing to pitch in. If your free website takes off, you lose resources.
If you don't want users to use it for free, don't offer it for free, but don't insult your users.