I don’t know why people doubt the salary figures. Just look at levels.fyi or other aggregator.
Salaries in tech are kind like the following:
120-200k base
10-30k sign on bonus (for 1 or two years)
20-40k yearly bonus
80-200k in stock compensation (you basically get company shares that you can sell on the market)
That, all together. Amounts to 200-500k yearly depending on your level. 200 for early old grads and 500 for people that negotiated well (with multiple offers) a few years out.