From the 7th Nov 2022 -
https://www.theverge.com/2022/11/7/23445476/elon-musk-twitter-user-growth-all-time-high-advertisers
A "monetizable daily user (mDAU)" is an account of either people, organizations, or other accounts who logged in or were otherwise authenticated and accessed Twitter on any given day through twitter, so thats 15 million more accounts per day that were creating money for twitter by adverts being shown to them.
I don't think thats how it works, well yes it does but with a big BUT
Now I must disclaimer I am about as far from an online marketing budget expert as you can get, but I know someone loosely (used to work with him about 10 years ago) who does this as part of their marketing day job
My understanding is (this is the simple model I was told its getting more complicated) that when agreeing a budget for an advert or campaign its capped.
The first part would be a simple, you must get our advert in front of x people, that may generate say 30% of the pot. The other 70% would be for want of a better term "click" based, so people following up on the advert by link. So they will need to generate y clicks to get the 70%
What can happen is the 70% can be earned before the 30% if it just happens to be something popular. Say someone planned an airfrier campaign six months ago expecting low take up, right now it would probably blast right by the clicks metric very quickly, but they still need to get the in front of x people to get the 30%, even though there is no more budget for the clicks.
Hope that makes sense.
So in theory there could be a lot more transactions taking place that are not generating any more revenue for twitter as the parts of the budget that are variable are already maxed out. The budgets are almost always fixed, not variable but capped.
Although I think the big issues is that Elon as part of the acquisition added around $13B of debt onto twitters books. The interest was predicted to be $1B, being VC that sounds reasonable.
Thats a massive increase to fund from either increased revenue, or reduced costs. The headcount reduction of employed and subcontractors is probably going to be around that, the big question in that case is can he really keep it working with that headcount drop.