eBay’s original scheme for its best sellers was the PowerSeller program, which shut down in 2021. One of the requirements was a positive feedback score of 98% or higher, so you did need good feedback to become a PowerSeller. However, PowerSeller ceased to have any tangible benefits several years before, so it was little more than an honorary status.
eBay’s current program for high-performing sellers is the Top Rated Seller scheme. This does have some worthwhile benefits, such as better search ranking and increased seller protections. However, it has no link to feedback. Instead, it is based on performance metrics such as defect rate, cases closed without seller resolution, and late shipment rate.
So, eBay takes practically no account of feedback in determining who its best sellers are. Strange, perhaps, but true.