I don’t know why they would even bother including a LinkedIn button, like LinkedIn isn’t a social media site, people aren’t going to share random shit to it. Even email makes more sense than a linkedin button. Even though most people wouldn’t share things via Email anyway, it’s more plausible than sharing on LinkedIn.
I don’t think anyone is arguing against their right to sell it, they’re being called out because people really shouldn’t buy it. It’s kind of a bad financial decision. If you still want to that’s your decision but people shouldn’t buy it without knowing they could get a better deal elsewhere. That’s why these things get called out for being too expensive, not because they aren’t or shouldn’t be allowed to, but because people deserve to know it’s a horrible deal.