“The Elon Musk-owned app saw its cost per impressions (CPMs) fall 38% year over year compared to last February, the report found. The click-through rate (CTR) fell 54% over the same period. That dynamic is likely an indication that demand has fallen, Kevin Synnott, a data intelligence lead at Tracer, explained.”
https://www.marketingbrew.com/stories/2024/03/27/x-ad-costs-engagement-continue-to-fall-per-report