I mean, I don't know? To be fair, I have not gotten an offer from either of those companies. Maybe I never could. But I did get an offer from a company that competes with them for talent and it's roughly at the L5 level at Snap and E6 level at FB. Looking at levels.fyi, I'm seeing $550k - 575k, and given that the offer I got was about $50k higher than the data levels.fyi has for the company in question, I don't think hitting $600k is crazy, especially if you have competing offers.