Meta has sent me notification that one of my ads is experiencing ad fatigue. I've looked at the data and the ad still seems to be doing well -- more sales in the past two weeks than the previous two weeks, more page reads, better conversion rate, more clicks. The only thing that's different is that the CPC has gone from $0.06 to $0.07, but that doesn't seem like a big deal or an indication of ad fatigue. So...my question is: should I do anything about this ad? Turn it off? Swap out the video? Or leave it be?