https://triplebyte.com/blog/fixing-the-inequity-of-startup-e...
https://blog.samaltman.com/employee-equity
https://news.ycombinator.com/item?id=11198991
https://a16z.com/2016/07/26/options-plan/
https://dangelo.quora.com/10-Year-Exercise-Periods-Make-Sens...