Why do you assume that if I care about the money, I only care about the money. You are making money from this business, so I expect you to pay me for my contrib

Why do you assume that if I care about the money, I only care about the money. You are making money from this business, so I expect you to pay me for my contribution what I think I am worth. This attitude that startups are doing engineers a favor by hiring them is hurting the startups themselves.