Probably because they were doing hyperspecific targeting, not because FB literally didn't have any more users to serve ads.
I doubt political ads are a major part of the mix - for one, there is little evidence that they are all that effective compared to TV ads.
Is this one of those weird "billion means something different in my country" things? Because even then, the miscommunication is usually between billion (10^9 in most English) and trillion (10^12), in short scale[1].
[0]: https://www.fec.gov/data/candidate/P80003353/?tab=summary
https://www.nytimes.com/2022/09/03/us/politics/senate-republ...
What really is the end game here? The whole point of money or power would be to use it to do something you care about? What use is money and power for the sake of itself? Why have it if all you want is more of it?
At least some rich people seem to want to do something with their riches and power. Which makes the rest of them even more of an enigma.
I just don't believe such person exist. Everyone wants something.
(Not really… there were just some newscasters that were really bad at math)
But he did spend like $1B as just one candidate in the primaries.
The fact that this isn't already the case is so weird. Probably due to the age of the constitution and legal system, its deification and the generic allergy to any evolution on that front.
Campaign regulations, including fairness in representation and budget limits are necessary for a healthy democracy, otherwise it's too susceptible to influence by rich people.
For instance, in Bulgaria that's taken to a somewhat extreme point - party/coalition lists running for election (it's a parliamentary democracy) get a fixed budget from the country if they fit the requirements (enough candidates, enough signatures) with a maximum allowance for donations and own funds to be used. Ads can't be just an attack on a rival, and have to include disclaimers who they're for, who they're paid for, and that buying and selling votes is a crime (an issue in Bulgarian elections, sadly). The system isn't perfect but IMHO it'd be far worse without those protections.
is what you are referring to.