Her salary didn't increase 98%, she got those things called stock options. Practically worthless pieces of paper unless she does something really good with the company, she may be able to trade some in the future. If PagerDuty burns, she gets nothing.
I was going to ask how you knew that, and if you knew what her exercise price was... then I realized I could just find the disclosure online: https://www.sec.gov/Archives/e...
It looks like she just (last week?) exercised options for 187,607 shares at $2/share when the stock price was ~$28.30/share. That's $4,934,064.10 net, right? But hey, this crap's complicated. A lot of those shares were from a 2015 grant when the company was probably worth a bit less.
Do we know what kind of stock she got (and tied to what strings) in 2022 and 2021? The most recent I found (in a quick search) was $7.43/share for her 2018 options. Salary.com shows her getting stock award of ~$12m in 2022 and $5.6m in 2021, compared to options in 2020 (and presumably earlier). If she got straight RSUs, those are still worth something. A whole lot of something.
You're not really wrong--this is total comp, not salary. But it's fair to call RSUs at a publicly traded company a hell of a lot closer to salary than ISOs at a private one.