A playable ad for a mobile strategy game achieves a 2.1% conversion rate in its first week. By day 10, it is at 1.4%. By day 14, it has dropped to 0.8%. The CPI has inflated 62% from its peak performance. The UA manager notices the decline during their Wednesday afternoon dashboard review, six days after the degradation began. They flag the creative for replacement. The design team begins production. A new asset deploys 9 to 12 days later.
“Creative fatigue is not an event. It is a process. It begins with frequency creep, progresses through CTR erosion, and ends with CPI inflation. If you are detecting fatigue at the CPI stage, you are detecting it at the wrong layer.”