I think it’s a bunch of factors, such as how often you deliver, what ratings are you getting, how many orders are being refunded, etc.
I’ve seen Fiverr changed a lot. Order completion rate didn’t exist, and Fiverr didn’t care. You could be a TRS with an 87% order completion rate, Fiverr didn’t care.
Now my order completion rate is 97%, which for me is amazing since I used to struggle just keeping it at 90%.
I also hate marketing my own stuff. I can sell anyone but myself, self-promotion is not my thing. If a happy client wants to talk about me, that usually works better. It’s the same reason some lawyers and doctors don’t advertise, they think advertising demeans their profession.