From what I heard, they only put the number of shares and an estimated value in the offer letter, so that amount is only accurate at the time they give the offe

From what I heard, they only put the number of shares and an estimated value in the offer letter, so that amount is only accurate at the time they give the offer - since Lyft's shares have dropped in value it's probably worth significantly less now. Some companies give refreshers to compensate, but not sure if Lyft does.