I did and still do sometimes a lot of 60-70 hour weeks, for months. But being in the service industry means you get paid in 15 min increments and the after-business-hour rate is much higher, usually 1.5-2X. So if you do the math it’s actually pretty good money and you will find very little people complaining about it. I never worked in product-first businesses and don’t know how the compensation model is, but there is no way I would work an extra hour that isn’t paid. That should be the norm.