Thank you for the pragmatic writeup rather than the usual "fantastic journey" blather. Also, returning investor money, rather than wasting it, demonstrates leadership.
This /might/ be a nasty setting for lawsuits later, if newco turns into a unicorn.
Good luck on your next chapter!
It would be wildly unethical and probably also illegal to use investor money to 'compensate' the founders when shutting down the business.
Some of the investors have pledged to reinvest in this new project, that is completely new and separate from the old project.
Thats how it sounds to me, at least. Doesn't sound shady.
I, too, found the post easy to read and straight-forward. If there was ever a great way to answer the hiring question of "Tell me about a time where you failed and what you did about it?" it would be this. Good luck in your next gig!