> Without any contract or promise, there is no obligation to anybody.
When a restaurant which you've been going to for years one day decides to serve you your favorite meal with a bit of poop on the side, do you not have the right to be upset about it? They're not under any obligation to serve you meals you're happy with. There was no contract or promise. The fact you're paying for their service doesn't buy you these rights either. Those are just the terms of service both parties have agreed to.
Similarly, open source software is much more than a license. There is a basic social contract of not being an asshole to users of your product, which is an unwritten rule not just in software and industry in general, but in society as a whole. The free software movement is an extension of this mindset, and focuses on building software for the benefit of everyone, not just those who happen to pay for it, or those who meet your specific criteria. Claiming you support this philosophy, while acting against it, is hypocritical, and abusive towards people who do believe in it. And your point is that that people who complain about this are entitled? Give me a break.
If you want to place restrictions on how your software is used and who gets to enjoy it, that's fine, but make those terms explicit by choosing the appropriate license and business model from the start. Stop abusing OSS as a marketing tactic.[1]
[1]: https://news.ycombinator.com/item?id=45666757