That's a bit unfair. Just because those 2 things are true doesn't mean that you are left guessing. You can estimate dilution per round reasonably well. You can

That's a bit unfair. Just because those 2 things are true doesn't mean that you are left guessing. You can estimate dilution per round reasonably well. You can guess the options (common stock) allocation per round and you will KNOW the preferred allocation per round. That doesn't make it meaningless. You can still calculate what your expected return will be based on a given valuation at exit. Here, I can even make it easy for you: $0. Don't take a job at an early stage startup based on financial reward! But also, the question is valid. Don't take less equity than you "deserve". The employers have a huge information advantage here. Does YC provide guidance on how to allocate equity to early employees?