Covers' 2026 index gave the Indiana Fever star 83 out of 100, with Angel Reese second on 80 and Paige Bueckers third on 67.
The study measured social reach, search demand, brand power and on-court visibility; Clark scored 100 in search, brand strength and visibility, while Reese led social media power.
Covers said Clark's partnerships, ratings impact and sold-out arenas make her the league's main commercial driver, as debate continues over her omission from a recent WNBA promotional advert.
With pay now tied to marketability, will the WNBA's new CBA create more off-court rivalries than on-court ones?
Why is a player ranked third in marketability the overwhelming betting favorite for MVP over the top two stars?