The lesson
Show the real ad as the proof on page one, then give the results as numbers a reader can compare.
The page titled "GSK Amplifies Global Health Innovation at UN Summit with Thought Leader Ads" has a screenshot of CEO Emma Walmsley's post on the right: a handwritten diary page, "Innovating for everyone - my trip to Kenya". Text beside it gives a CTR of 2.61%, 335% above the healthcare benchmark, 25% more dwell time and over 900 clicks.
Don't copy the formal tone or the thought-leader-ad product pitch. Keep the creative as the lead exhibit and results stated against a named benchmark.