I quickly realized those are the absolute worst positions to be in. You take almost as much risk as the founders but almost none of the upside. One startup died, the other one sold for 100m$. Out of that I saw 400k$ as an exit. Not too bad but even with that exit I ended up making way less than if I joined a FAANG. In both cases the founders made millions (through the exit or through liquidity)
Now I'm a realist. Either you create/found a startup or it's not worth joining one as an employee. You have way more upside at a FAANG/pre-IPO mid-life startup that already found a great product market fit.
Essentially, founders are pushing a crazy narrative of Startups being worth it to early employees because they need them. It was sometimes fun but I wish I just joined a FAANG like most of my friends, I would have a couple millions by now if I did.