Low five figure investments ? You seem pretty angelic to me. Us mere mortals don't have that kind of ca$h bro!
Most people who work in Silicon Valley for a while can afford to make a few small investments like that if they choose. Others buy a nice car, or whatever. It can be seen as an expensive hobby. Many angel investors are regular working guys/gals.
If those numbers are right then that still does sound out of reach. Though to be honest, $100k per investment also sounds out of reach to me but I haven't had any big silicon valley payouts.