The only times we can’t do that (and that’s happened maybe 1-2 times in the history of Lambda School) is when it’s a change to teams of students that run across multiple cohorts.
But frankly, if the only thing you took out of this post is that the ISA structure is poor, without considering how you have all the power to set and enforce terms in your contract, I don't think I have much else I can say to try and help you. I think there are a lot of ways you can improve Lambda School to make it better for the people attending. And they don't involve deleting Reddit threads of criticism.
Edit: s/selling/securitizing
For what it’s worth, major changes in curriculum do lead to refunds at schools. There have been two examples in my education where mid-year I had a graduate level class need to be rescheduled from a night class due to a professor’s illness. Both were fully refunded when I couldn’t fit the class into my work schedule. That seems to be pretty analogous here, and I wasn’t charged a percent based on how many weeks I attended the class before the change. I was just refunded the total amount of the course because I wouldn’t be able to gain its value. It wasn’t even a difficult process to get the refund, unlike the weeks of trying to get support it seems like the person in this situation attempted.
I think I would place ‘elevated’ expectations for refunds on a founder due to the elevated risk of trying a Startup’s unproven, expensive, and risky education model. I don’t think the expectations are ‘elevated’ but I also think your baseline for doing good for students shouldn’t be ‘it’s only as bad as I perceive the alternatives.’ I think we should strive to do better.