You're confusing revenue with net income.
Plus, if the best that Figma can do with a billion dollars is just invest it in Treasuries (and I'm not saying that's the case), then they should just give it to their shareholders and see if they can get a better return. I only point this out because many people are often confused by the effects of higher interest rates, e.g. "Why did this company lay off all these people when they're still profitable?" Your example highlights the reason why perfectly - if you're a company with a billion dollars of investment and the best profit you can muster is $50 million a year, you're a great business if Treasuries are only paying 1%, but when they're paying 5% you should just basically close up shop as people can get the same return just sticking their money in Treasuries.
