By contrast, the 3 GitHub founders each took home about $1.25B from their $7.5B acquisition. Mark Zuckerburg's Facebook stake was worth about $20B in 2011, out of the roughly $85B market cap. Larry & Sergey own 11% of Google today, 15 years after it became a public company. Kevin Systrom netted about $400M from Instagram's $1B sale. The three YouTube founders took home around $700M of YouTube's $1.65B sale. Jan Koum and Brian Acton together took in about $11B of WhatsApp's $19B sale, including continued stock incentives (they may've forfeited some by departing FB early). AFAIK Markus Frind took home nearly all of the $575M that PlentyOfFish sold for.
I was also surprised at how low the founder ownership stakes were for Box (3% IIRC) and PayPal (Elon Musk was the largest founder shareholder at about $85M of the $1.5B purchase price). It really does pay to keep capital requirements low, profits high, and get on the hyper-growth curve before taking lots of capital rather than taking lots of capital so you can get on the hyper-growth curve.