When I used to do AMS, I recall the data lagging. I'd usually wait about a week to see if an ad is selling--and sometimes, unfortunately, even the sale data turns out wrong.
I've failed AMS multiple times in the past and have completely given up with it. I've resorted to BookBub ads as my main source in sales.
Yes, likewise I've tried AMS a few times and failed dismally, but on those occasions I was trying to kick some life into non-performing titles. This time, I'm targeting a book that has sold quite well with facebook ads and even now, with FB paused, is ticking over organic sales. But I've had the feeling of losing control of the FB ads and primarily want to see if i can transfer, if you like, the marketing impetus or influence from FB to AMS.
The "known" factor here is the appeal of the book. So if this again fails its gotta be the ads, not the product. Its weird logic, I know, but if I'm careful costs me nothing until I get it right.
Theoretically...