And there are a bunch of suckers who put in X% the work that each cofounder put in and are getting (X/1000)% of that 500M. It's because they assumed 1000x less risk presumably.
I for one hope for market forces that will rebalance these discrepancies. Talented 1st employee shouldering most of the technical brunt taking <1% plus dilution is selling oneself to the dogs.
Being a founder is a hugely stressful job, and everyone I've seen spend 5 years as a founder has aged more like 10 years in that time.