I will admit to passive-aggressively refusing to help people fix their Macs and iPads, telling them that Apple makes a point of being closed and proprietary, an

I will admit to passive-aggressively refusing to help people fix their Macs and iPads, telling them that Apple makes a point of being closed and proprietary, and that if they want free tech support from me they should ask me for a software recommendation I'm willing and able to stand behind first. But... I don't really care if my contributions to open-source get used in a closed-source product. I just won't buy it because you intentionally neutered my ability to fix it myself. And I'm going to raise that point if your potential customers ask me what I think of it. But I don't feel any bitterness over it that I don't also feel for stuff that's entirely proprietary to begin with.