It's not unfair. I have a different standard for proprietary payware and proprietary freeware. With the former, you know where you stand, but in my experience, the reasons for not releasing freeware under a FOSS licence are normally user-hostile, like baiting in users with a free product and charging money once they're hooked. I've been bitten too many times, so I don't tend to install proprietary freeware anymore.
