Today, ISO’s are commonly given to engineers at pre-IPO startups. Nothing says they have to go to execs. Those engineers end up holding them for years before they can exercise, so $100K is a small fraction of a normal Silicon Valley startup, when you divide it out. Many startups take 6-10 years to IPO these days.
Source on $100K cap: stock plan admins at work, and also this article: http://help.capshare.com/knowledge-base/what-is-an-iso-100k-...
Please do not comment on technical nuances of the tax code you do not understand. Misunderstandings around this stuff bankrupts people all the time. (especially the type of people that hang out here!)