Such things in-fact happened to me (even tho I'm a bit younger than Mayer & my career started a few years later than hers), human memory is really unreliable & a lot of times you remember your feelings & translate those to facts upon recollection even when that wasn't quite the case.
"This CEO rewrites history! My friend's memory is more trustworthy!"
I was at Netscape and was actually in meetings that marca, and others were not in, and it's funny to hear what they say happened, when they weren't in the room, nor were they consulted. Even the people at the top can be guilty of speculation.
If both companies’ data needs to be combined an analyzed, they usually bring in an outside deals consulting firm. Those teams tend to be very small due to the sensitive nature of the discussions involved — usually 2 or 3 people (backed by a large shared support staff and tooling) over the course of a few weeks.
Often the data used is a combination of proprietary data from both companies, commercially sourced data or proprietary data platforms built by the consulting companies. Deals are a big, sensitive, relationship-driven business.
It's often one guy with a spreadsheet, and 1-2 people to review the spreadsheet and a few business people to validate assumptions. The modeling is easy, getting the assumptions right is hard.
To be honest, if you're skilled very simple models that you can do in your head or in a few minutes usually give you a perfectly good answer. The more complex exhaustive models are usually there to make sure you didn't overlook something or 20 small inputs all cross multiplied to throw your answer off.
Getting the answer exactly right also doesn't matter, if you make $90m in profit off a deal or $100m your going to do it. What you are most concerned about is making sure that you don't lose money and what factors would push you to do that.AOL had ad inventory and Google had to get enough eye balls?
See also the Yahoo/Bing deal which didn't work out as well. Microsoft didn't end up actually hitting the targets, and convinced Yahoo to take less; and Yahoo also didn't reduce employee count anywhere near plan on searchy/advertising stuff, so they missed targets on revenue and cost and user experience.
It was guaranteed revenue IIUC, something like "If you do not make at least $150M from this deal, Google will pay you the difference." That makes the deal a no-brainer for AOL, but puts Google on the hook for any shortfall, which could have potentially ended up bankrupting the company.
CPC = Cost per Click (cost per 1 click)
These terms are widely used today.