I read it between the lines as some sort of fallback in the case that your particular startup fails, as most moonshots do. If every founder in the batch works

I read it between the lines as some sort of fallback in the case that your particular startup fails, as most moonshots do. If every founder in the batch works out something small like 1-5% split amongst the founders of the other cos, then everyone in the batch has the potential to benefit if one does company well, and then they also have more incentive to help their other batch companies out.