Twitter had 3,900 advertisers in May and 2,300 in August.
There were more than 1,000 new advertisers on the platform each month before July, when Mr. Musk’s feud with Twitter began to intensify and the number of new advertisers sank to 200.
“We are witnessing the real-time destruction of one of the world’s most powerful communications platforms.”
https://www.nytimes.com/2022/11/04/technology/twitter-advertisers.html