[derefr]

What is the self-sacrifice in this case? You're trading "working to build a business to earn an equity-stake" for "free-riding on others' work to build said business to make your equity-stake more valuable."

Think of it as two separate companies: Startup A, which you co-founded, and which ended up dissolving, you seeing nothing for your efforts (other than whatever salary you managed to scrape out); and then, Startup B, which you bought a huge number of shares of for the amazing price of $0/share, and now get to smile as those shares appreciate, like any investor. It just so happens that Startup A and Startup B are the same company at different points in their life, but that shouldn't change your views toward the two situations.