New York Times:

Ad analytics platform Pathmatics: Facebook’s top 100 advertisers spent $221.4M from July 1 through July 29, down 12% YoY from the $251.4M they spent in 2019  —  Major advertisers on Facebook reduced their spending by millions of dollars in July, but not enough to significantly damage the platform’s revenue.

Ad analytics platform Pathmatics: Facebook's top 100 advertisers spent 1.4M from July 1 through July 29, down 12% YoY from the 1.4M they spent in 2019 (New York Times)
Source: Tech Meme