I was one of them! Joined on August 5, 2012, got 0.5% of equity (I think?), it all went to more-or-less zero monetarily. I don't think most of us really hold any grudges against Sahil here. It was a very fun place to work, and I met some of my closest friends and made some of my strongest professional connections there. It was net-very-positive to my life and career, and I think we were all adults when we were opting-in to the experience.

As for Sahil/Gumroad making money and growing. Meh. He's worked on it for 13 years and showing dedication beyond what I would have for most things. It's fine.