(a) I was young(er), (b) I recall other highly-funded startups failing at the time, (c) at the time the whole thing just sounded laughable/sketchy.

Not to mention I was on a visa...

200k is fairly normal if not low for a senior backed role in SF. Especially considering that any stock options you got would end up being worthless.

I feel like you can quote just about arbitrarily high number for an SF engineer salary and someone will come out of the woodwork to tell you that it's actually low.

"senior" is overused, in reality a junior-senior can easily make 150k base, a senior-senior can make 250k base. And we're not even talking about netflix.