Hi, a few weeks ago my adobe stock account was blocked for similar photos. I checked and, without my noticing, some files were sent 2 times while uploading. I deleted the duplicate files and my account was restored. During the next 6 weeks my sales have halved. Has this happened to anyone else? I believe that the sales statistics and consequently the search ranking has been canceled and I don't know how to restore it. I have also contacted adobe but they say nothing has changed. I used to sell fifty files a week, now half of it. to find a solution, or maybe some insight from MatHayward thank you for your answers!

My guess would be: You deleted the dublicates, so you removed images from your port. Less images -> Less sales.
Also, 50 sales a week isn't that much, that's around 7 sales  a day. Not a big enough number to say for sure that a decline in sales isn't part of a normal fluctuation, so it could just be coincidence.